According to other technical commentators, in addition to Jonathan's list your typical Windows Phone 8 offers:
Enterprise support — Corporations and large user groups will appreciate being able to manage large numbers of Windows Phone 8 devices, including a built-in Company Hub app, Bitlocker encryption and Secure Boot technologies. Lack of enterprise management tools has been cited as an impediment to large corporations embracing Android. While enterprise management solutions exist, Android’s fragmentation means they dont work across the board.
C and C++ — Developers will be able to code for Windows Phone 8 using C and C++. The languages themselves arent so important, but support for them means coders will be able to utilise popular libraries, as well as do native DirectX-based game development.