The REAL problem that virtually nobody tackles here is that games are now developed in 30fps because they must render in high-def resolutions. When you're trying to crank out 1080p with high dynamic range and AA and etc, you've got to trim the fat somewhere, and that somewhere is pretty universally framerate.
You must be talking about consoles. PC games have been rendering in "high def" resolutions for years without being limited to 30fps. If current gen consoles can't handle more, then the solution is simply more horsepower and it will likely be solved in the next generation.
Any problem whose solution is "wait one Moore's Law generation" doesn't seem like a particularly tricky one.