I'm happy for games like Uncharted to be 30fps tbh. Obviously with VR it's different as the higher frame rate is a matter of necessity to avoid sickness and poor viewing, not just a matter of compromise. I also think hardware improvements are relative. If the PS4 was twice the power it is today, that doesn't automatically mean Uncharted 4 would have been 60fps. They may very well have stuck to 30fps in order to push even more graphical fidelity, such s has been the case every gen thus far. Some developers just prefer the added eye candy, scope etc provided by going 30fps with such closed development optimisation.