High Level Features in SharePoint 2010

 Sites:

• Ribbon User Interface
• SharePoint Workspace (Sync Framework)
• SharePoint Mobile
• Standard Support

Communities:

• Rating
• Inline editing support for Wiki Pages/Blogs
• RSS Activity Feeds (Similar to Alerts but feed based)

Composites:

• Business Data Connectivity Services
• External List
• Silverlight and AJAX Support
• Workflow (Site Level and Workflow draft)
• SharePoint Designer Changes
• Visual Studio 2010 Support
• Event receivers enhanced (Site deletion/Web App Provision/Deletion etc.,)
• User Interfaces
• API Enhancement - LINQ to SharePoint/ COM & REST/ATOM

Search:

• Social Relevance and Ranking
• Phonetic Search (examples B2B etc.,)
• Better Search Navigation
• FAST Integration
• Extensible framework - Search Connector Framework

Insight:

• Performance Point Services
• Excel Services
• Visio Services (Web Browser Support)
• 2D/3D Chart Web parts
• SQL Server BI Technologies Integration
• Power Pivot

Content:

• Audio/Video content types for streaming
• Digital Media Assets for DRM (Digital Rights Management)
• Document Set
• Tagging/Tag clouds & Taxonomies
• Social Bookmarking
• Org Browser
• Profiles- Other directories integration

Developer Features in SharePoint 2010:

• Large List Throttling
• Referential Integrity & Join support to List Columns
• Event Receivers support to Custom Error Pages
• Ranking Support
• Validation Support to List and Columns
• Event Receiver Post Synchronous Execution Support
• VS 2010 Projects, Item Templates for Lists/Schema Definitions
• BDC services support for column definitions
• Visio Based workflow design support
• Reusable workflow support
• Site Workflow support - Capture Site Events
• VS 2010 Project Item Templates for Workflow Customization of UX
• Developer Dashboard for Debugging/ Tracing
• Silverlight Web part Support
• PowerPoint based Theme Design
• Theme Preview Support
• API Enhancements
  • Client Object Model
  • LINQ to SharePoint
  • ADO.NET Data Services/ Web Services/ REST
  • Silverlight Client Object Model
  • ECMA Script library support
• Application services Architecture (SSP - Not extensible for custom services. Everything or none)
  • Scalable - Shared across farms
  • Extensible
  • On demand basis usage
  • Access Services
  • Business Data Connection Services
  • Excel Calculation Services
  • Metadata Management Services
• Claims based Authentication Support
• Unified Logging Services & Correlation ID Support
• Resource Governance/ Throttling
• Record Management Features (at Site Collection Level)
• Multi lingual Support in the same site instead of Variations
• Audio/Video Content Types – Streaming
• Document Set
• Remote Blob Storage Support (for large files)
• Visio/Excel/Word/Access Webpage
• Profile Import - Sources Enhanced (AD, LDAP,BDC, Custom)
• Sandboxed solution deployment support
• Health Monitoring Support
• End to End PowerShell Support. More than 500 cmdlets
• SCOM Management Pack Support