- Thanks to WinPRT, Windows Phone 8 Developer Preview is able to support a significant subset of the Windows 8 SDK
- In addition to native development, Direct3D® is being added to the family of Windows Phone technologies
- New APIs  include a new map control powered by Nokia maps and a wallet API for storing payment methods and enabling NFC-based payments.
- Unfortunately for HTML developers, HTML-based phone apps are not a supported app model in Windows Phone 8 Developer Preview.
- Windows Phone 8 Developer Preview only supports Direct3D, not the entire DirectX runtime
- The DirectX feature level supported in Windows Phone 8 Developer Preview is level 9_3
- Talks continue with key [game] middleware vendors but we are not able to announce any middleware compatibility with [WP8] just yet.
- Windows Phone 8 Developer Preview supports hot-swappable SD cards, and provide read-only API access to user content stored on them.
- Marketplace developers have API access to the Windows Phone 8 Developer Preview Bluetooth stack, courtesy of WinPRT.
- The Windows Phone map system is being upgraded to Nokia Maps, which features beautiful cartography, […] a new 3-D mode…
Interesting stuff! If you don’t already follow Steve on Twitter I highly recommend it. He’s always sharing great new info on tons of mobile platforms.
Update: This post goes into more detail on the leak of the SDK itself and the differences between the Windows 8 RT API and Windows Phone 8 API.