Apparently Microsoft is preparing Windows 10 for the Raspberry Pi 2.
Does anyone know anything more?
You can apply here but dont expect to find a graphical interface. https://www.windowsondevices.com/signup.aspx
Also i think this WIndows 10 version is going to be something like the windows for the Gallileo platform check here https://www.youtube.com/watch?v=yrRMomesBKM
There is an article about it here:
Will Windows 10 on the Raspberry Pi have a Desktop?
