- Jump lists to easily access applications
- Global search : Search either local applications or go to the marketplace search
- Built in support for podcasts in Marketplace search ( pivot filtering )
- Improved hubs ( inclusion of a Games Hub in the marketplace )
- Smoother scrolling i.e it's blazing fast now
- Live agents
- Application multitasking for background processing, audio and file transfer, and fast app switching
- Support for 16 more languages
- Developers in 38 (up from 30) countries can register to publish applications
- Phone users in 35 (up from 16) countries will be able to purchase apps
- Browser uses same IE9 code-base for HTML5, JavaScript, CSS3
- Address bar at the bottom
- Background audio for HTML5 in browser (use phone controls too)
- H.264 video in video tag in full screen with controls
- Phone integration
- Sockets ( IRC clients ! )
- SQL CE Database with ORM and Linq to SQL
- More launchers & choosers (inc. deep link to directions)
- Better access to contacts and calendar ( WhatsApp, finally ? )
- Pin to start of application deep links
- Raw camera access ( Layar and other AR apps )
- Access to compass
- Access to gyro (new optional hardware coming this year)
- Motion Sensor API (for ease of using compass and gyro)
- Ringtone API
- Multi-tasking
- Fast app switching – apps are suspending, and only terminated if necessary
- Background audio from apps (leveraging the standard phone media controls)
- Background downloads
- Setup alarms
- Live tile updating including animations
- “Live agents” occasionally run by a battery friendly scheduler (with user control of which ones can run this way) – gets events and can get location
- New emulator features for Accelerometer (with 3D model of position) and location (with Bing maps input)
- Performance improvement (for list)
- Scrolling and input
- Image decode
- Garbage collector (no pausing)
- Memory usage
- Built on Silverlight 4 including RichTextBox
- Local Database using SQL CE with ORM and LINQ to SQL
- Can compose UI with Silverlight and XNA
- Profiler (still free)