But then again, ten years ago, when good old Windows 95 came out, everything was overkill! Now, try playing Doom 3 on your old card... not gonna happen.
Technology changes, and this opens possibilities FOR the new games, before they even bothered coming out with them. Same as if you have a 10ghz processor, people are going to add more features to their programs under the impression, hey, its out there, might as well use it.