True, Sony have stated that the PS2 will remain a viable games platform for several (five?) years, yet.
I was going to buy a PS2, but now I think I'll wait and buy a PS3. Especially with a Linux distro, that allows for much more flexibility replaying all the media formats. (Although Vista includes Media Player 10, which allows for burning media from, e.g. the DivX codec, straight to DVD. There will already be similar functionality for Linux in the wild.)