If you put a bit of thought into it, this thread is redundant
Simple answer; Ideas don't last forever, they get old and repetitive as the technology does.
Basically, until we get a full vitrual reality enviroment capable of simulating vast worlds with gaming elements all games will be the same, so get used to it.
Personally, I have fun when I'm pressing keys to get money and levels in an MMO or when I'm shooting people to win in an FPS, just because you don't doesn't mean that gaming as a whole isn't fun any more.