Guys, stop worrying that much. If Microsoft *ever* gives out an operating system that is really, really great, why should we be sad about it? It'll make Apple and all other players be even better or die. That's how the market works. Okay, MS *has* dirty hands in this market and will eventually be punished, but it didn't kill Apple or Linux just yet, right? And why? Because there are (and will be) things you just can't do (right) on Windows.
If we were talking about a different market, like, say, automobiles. What would happen if Mercedes Benz came out with a car that would 'solve it all'. Good (as in NO POLLUTION AT ALL) to the environment, small size, big interior, fast speed, cheap price. Would every other market player just fade away? Nope. They'd copy what they can without infringing patents, they might license others and will innovate on other playing fields inside the same market.
So, okay. Microsoft might release a killer operating system sometime in 2003 or 2004. Apple will easily keep up with the pace, I believe. Right now, Apple is even *creating* playing fields like Desktop Video. I'm sure they are planning on creating others. They're also leading those fields, because as their creator, they're one step ahead.