Then prove to me that they are indistinguishable then, go on then, your telling me you can tell the difference between different resolutions on the PC, yeah thats fine, first of all PC games are usually ran at the screens perfect native resolution, so changing it will cause the screen to scale so that you will be able to tell the difference allot more, secondly when you change the resolution on a PC game you are changing it in much larger increments than from 630p to 720p, how many games have you compared at that resolution, and also don't forget that PS3 and 360 games running at that resolution on any HD panel will be scaled, 720p isn't even the true native res of any 720p lcd panal out there, their true resolution is 1366x768, so as you are not running the game at the panels native resolution and it is already being scaled then changing the same game (if that was possible on the same system) to 630p would be pretty much indistinguishable, because you are changing an already scaled resolution down very marginally to another scaled resolution, you sir need to learn allot.