Everything in the Delphi development environment is designed to help you get your job done fast and right the first time. Delphi 2010 adds even more time saving IDE coding features and improves on many existing features to help you code and develop faster than ever:
Delphi 2010 includes IDE insight for instant access to all IDE features, settings and components “at your fingertips” without searching through menus and dialogs 
Integrated Code Formatter automates consistent coding styles with less work
Delphi 2010 includes revamped Search and File Reopen to find the information you need faster 
Debug Data Visualizers make sense from cryptic debug data by displaying in easy to read formats such as strings, date and time values
Debug Thread Control for freezing, thawing and isolating threads; and setting breakpoints for selected threads so you can track down problems faster
New introductory Code Audits and Metrics in Delphi Professional for better understanding code and project health; full set of audits and metrics in Enterprise and Architect
Delphi 2010 includes checkbox for Boolean types in the Object Inspector, greatly enhancing readability
Delphi 2010 includes support for Windows Imaging Component (WIC) including JPEG, TIFF, GIF, PNG, BMP and HD Photo image formats. RAW camera formats (such as NRW, NEF, CRW, CR2, RW2, ARW, SR2, SRF, ORF, PEF and DNG) also supported with manufacturer supplied codecs
Updated look and feel for modeling diagrams
Property Editors for Date properties now use Calendar controls
Improved search features in the editor with Find tab integration
Delphi 2010 added capabilities and configuration to the File | Reopen menu
Expanded and enhanced documentation

Free your customers from keyboards
Delphi 2010 rapidly build touch based GUI, tablet, touchpad, and kiosk applications or easily upgrade existing applications UIs with little or no additional coding.
Integrated gesturing framework with multi-OS support for Windows 7, Vista, XP, and 2000
Gesture Designer enables full control of all gesture design and interaction
Gesture components (TGestureListView, TGesturePreview, TGestureRecorder) to build gesture creation and management into VCL applications
Interactive multi-touch gestures for panning, zooming and rotating (requires multi-touch enabled OS)
TTouchKeyboard a virtual keyboard for enhanced non-keyboard interface interactions that supports multiple locales and languages
Delphi 2010 includes fine grained control over touch and gesturing behavior in your apps – Form, Container, and Control level control
Compatible with both touch-enabled hardware or traditional input (ie Mouse)
Integrated support for both touch and multi-touch interfaces in the base VCL
30+ standard gestures for panning, zooming, rotating and more
Pluggable gesture engine architecture – use VCL, Windows, or your own custom recognizers

Delphi 2010 makes the connection with data and apps
With Delphi 2010 you’ll make the connection with more data, more Web Services, and more application architectures
Delphi 2010 includes new Firebird 2.1 and 1.5 support in dbExpress 
Updated dbExpress drivers for InterBase 2009, Microsoft SQL Server 2008, Oracle 11g and MySQL 5.1
Take advantage of Web Services functionality from Amazon and others with new SOAP 1.2 client support
HTTP communication and in-process connectivity for DataSnap multi-tier applications
DataSnap callbacks enable servers to communicate with clients
Filtering allows for complete control over the data stream between clients and DataSnap servers
Delphi 2010 includes new DataSnap wizards from the Object Gallery to make server creation even easier
Participate in popular application architectures with REST and JSON values support in DataSnap

Delphi 2010 reach more user desktops
Support more Windows desktops without worrying about the specific Windows API details of each version and support users worldwide with Unicode throughout the development environment and improved language support.
Theme Aware - VCL controls are optimized to take advantage of the theming capabilities of XP, Vista and Windows 7
Fully Unicode enabled throughout to seamlessly handle worldwide data, databases, and user interfaces
Delphi 2010 includes touch and gesture enable apps on Windows XP and Vista including multi-touch support in Windows 7
New Virtual Touch keyboard for embedding into applications
Access New Windows 7 APIs, including Direct2D that allows easier rendering, better performance, and excellent quality output
Expanded Open Tools API for building plug-ins to the Delphi IDE that give finer control over tabs functions and code editing features like code folding
Easily switch between English, German, French and Japanese translations for Delphi IDE menus and dialogs, compiled units, resources, and source code

Code and compile like never before
Delphi 2010 includes new RTTI support and new compiler and language enhancements
RTTI support for exposure of Methods, Fields, and Properties to support dynamic invocations and increase reflection capabilities
Enhanced Object-oriented file and directory IO classes for simplified file processing
Custom attribute support for most code elements - types, fields, properties, methods and parameters
Enhanced TStringBuilder for easier and faster string concatenation and manipulation
Enhanced generics with full RTL list and collection support
Background compilation so you can continue working while you compile
More data modeling power in Delphi 2010 Architect

Delphi 2010 Architect edition includes new ER/Studio 8.0 Developer Edition to help users discover, document, and re-use data assets and gives you the power to easily reverse-engineer, analyze, and optimize databases. New ER/Studio features include:
Visual Data Lineage - Visually analyze and document how data flows through your organization without needing to inspect code
Attribute-level Submodeling - Choose which attributes/columns to include in the entities/tables in the submodel and also describe submodels on the new Definition tab, then create queries to search on the definitions
Object-level Compare Flags - Indicate intentional discrepancies when comparing models that the Compare Wizard should ignore
Delphi 2010 produce reports in HTML format
Delphi 2010 includes Microsoft SQL Server 2008 support