Don't get your hopes up, by all accounts 'Windows 10' on the Pi 2 is a special version just for running GUI-less embedded applications. Look at what they have already for the Galileo/Edison (C++ only apps, no GUI) and extrapolate a little bit from there.
The terrible media circus that said Windows 8/10 would run on a Raspberry Pi forgot to mention that it would be the embedded editions of Windows, specifically designed to run IoT-type apps. Not the desktop version.