Ten years ago the video card wars were in full swing. Each generation brought amazing new advance and impressive technology.
But nVidia and ATI haven't realized that we passed the point of diminishing returns years ago. Mobility and battery life are what matter. And I know there are hardcore PC gamers out there, but there are only a handful of companies even bothering to push the high-end graphics, so you buy a $500 video card and there are exactly ZERO games that take full advantage of it. Wait a year or so, and you may find that one or two of the few high-end PC game makers decide to throw you a bone and add support. And as a bonus, you get SIGNIFICANTLY increased power consumption, and the video card addicts are just wasting resources so they can all whack-off to Shader 30.0 soft shadows on eyelashes.
It's a weird, captive, completely pointless market unless you're doing 3D rendering for a living (for movies, for commercials, for product design, etc.).