I'd prefer more of what we're currently getting in the PC space tbh which is ever closer integration between discrete CPU's and GPU's to bring the advantages of both UMA and separate dedicated processors under one umbrella. Things like resizable bar, smart access storage and HBCC are great examples of this. The tech just needs to become standardised so it can start being treated as the default by devs.
Thats how DF said it too, and id imagine 99% of the industry agrees on that. Both performance and flexebility.