seems like they're using the best of both win 7 and 8, in a sensible way aswell.
I do wonder about what win 10 will bring under the hood though. So far they mainly talked about UI stuff, but there's bound to be more to be had.
personally I'm hoping they'll support HSA, as it appears to be the most likely standard when it comes to heterogeneous computing, the thing most people seem to agree on as the next big thing. Basically the only ones not (openly) supporting it are Intel and Nvidia (who would've thought!), but amd and most mobile chip vendors do, and as win10 is as ment for mobile aswell i see it as being something that could prove quite advantageous.