"Breakthrough"? Let me guess:
1.microSD card slot,
2.removable battery,
3.great battery capacity,
4.(privacy) settings that don't get changed automatically without informing the user about anything,
5.cameras that don't turn themselves on automatically without notification?
That would definitely be amazing to begin with.
Innovation? Curved screens (hint, hint, SGS6 Edge), or anything to make that phone stand on its own and not be "just another piece of plastic no effing different from the rest of the pack"?
Oh yes, that would be great, but who do you expect to bring that? Microsoft? The [unt behind Windows 10 (a.k.a. the Spy Operating System)?
Think again.