Bubble Bobble, one of the hardest games to make work in Windows XP (Only DOSBox had made it so far), not only works, but the game also recognizes an inferior processor and/or a lesser amount of RAM, making you face a few less enemies on some levels, which happens if you play it on an actual 8086/8088.
Needless to say that it's playable, although some almost imperceptible delay occurs between keystroke and reaction of the character but currently I'm testing it on my notebook which, obviously, doesn't have the same performance as my desktop PC.
Scopa, an Italian card game, on the other hand, doesn't work. It's an extremely "simple" version of the game since it works on CRT, without a graphics adapter. When I have to select the necessary points to win a game (usually 21, 11 or 37) it doesn't hang but it looks like it won't accept any value. http://anonym.to/http://en.wikipedia.org/wiki/Scopa
CPM/86 operating system seems to work. I couldn't do much testing because I didn't learn how to use it yet. Anyway as you can see it succeeded in booting!