They demo Photoshop running on a Qualcomm processor: https://www.youtube.com/watch?v=A_GlGglbu1U&feature=youtu.be
2. Existing "desktop app" authors can opt to package their app in a way that will make it possible to distribute through the Windows Store.
If they're going to let people build/distribute native ARM binaries for Windows 10... then I'm even more impressed. I guess I would've expected that to be mentioned though.
If this is the case, that would certainly invalidate my comment about the compatibility matrix. I guess in that scenario, I'd agree and hope that those folks are working on a "fat binary" or "universal binary" or something to aid with the potential confusion.
Hasn't that been possible since Windows RT?
I don't think we have details if the new plans include allow developers to cross-compile Win32 apps to ARM, in addition to the x86 emulation.