The Apple trackpad is here. I've blogged on this before. I think for a lot of day-to-day use, window applications are on their way out, since gesturing is in, and that just doesn't go well with pixel based point-and-click.
I don't think it's a mousepad replacement though, are we at the end? If I see how I use my MacBook pro, I now often grab a mouse, but that could be the windows interface I am looking at. It's both comfortable -if you can use only the mouse to, say, surf the web- and uncomfortable -if you find yourself switching between keyboard and mouse a lot; gesturing stuff just goes nicer-.
Windows? If I want to play a first-person shooter, I prefer Quake.