I don`t think Windows Millineum would be much good either, if you plan on playing older games. If I`m not mistaken it`s DOS emulator is the same as win2000. The major difference between the 2 is that it`s more multimedia friendly than Win2000.
I did hear a rumor, though, that it loads up in 9 seconds no matter what computer you have, but that remains to be seen.