PodXCOM yeah but you are expecting a leap like from ps1 games to GTA3, or something like Quake 3 or Unreal Tournament.
Those days are over, game makers aren’t making bets like they did long time ago, they want to be sure they are going to make money, Live and Psn stores, limit creations to Low Budget /Blockbuster games, there are no “in betweens”, no new devs that could go right to the top, even in movies they sometimes risk a failure, that doesn’t happen here anymore.
Sure it will look better, but not that much, 720p to 1080p is almost unoticeable, try changing that on a pc, thats not a “leap”, its just a little upgrade, that most gamers on pc already have.
Tech Demos are just that, Tech Demos, not even the biggest developers (at least in all my years of pc gaming), have been able to deliver the quality of a Tech Demo (not ever).
Those FF tech demos could run perfectly on a pc (in a 2500k, 560ti, 4gb ram, cheap), and on a console at lower resolutions.
Go check the Tech Demos on the www.nvidia.com and www.amd.com, plenty that look better that the FF one, yet there is no game with that quality.
Source Article from http://www.gamespot.com/news/carmack-not-all-that-excited-about-next-gen-6383434