They can build experiences while providing better CPU, they just have to find smart ways to amortize. Cell phones and smart gadgets have been doing it for years now. I think that 5 years is plenty of time to have considerable technological growth.
Dear Mr. Carmack,
AI, AI, AI.
Improve, A LOT.
That goes for the other developers.
Thank you for your concern.
@drangel_jam Agreed. The increased CPU power could be used for improved artificial intelligence, physics, longer viewing distances, and bigger hordes or enemies. And given the way that current games scale for a range of systems, it's clear that developers are alerady ready to use the increased power.
If you compare current games on a game console to the same games on a high-end PC, there's no contest. You'll immediately realize how much fidelity is being discarded in order to fit the constraints of a console.
Carmack already said things look better on PC. What he said too was that such difference was not enough to warrant a new generation of consoles.
I see his point. If new consoles looked like current PCs It still would be nothing compared to the leap that was PS2 to PS3 for example.