^ there is nothing like high definition video quality. HD is just a term to denote resolution and nothing else. you've probably heard stuff like 720p, 1080i and 1080p which is 1280x720 progressive frames, 1920x1080 interlaced frames and 1920x1080 progressive respectively. we've had these resolutions (except the interlaced part of course) for a long time now on PC. even quake 3 supports it.
just running at an HD resolution alone doesn't mean that your game has to look good. if you run an old game at that res and then a new one, the 'quality' you mean (which im assuming is gfx) will obviously be better on the newer game thanks to more detail, more polygons, higher resolution textures and better lighting.
just running at an HD resolution alone doesn't mean that your game has to look good. if you run an old game at that res and then a new one, the 'quality' you mean (which im assuming is gfx) will obviously be better on the newer game thanks to more detail, more polygons, higher resolution textures and better lighting.