Coming to the most important part.. the games :). The quality of the default games provided by windows has for sure increased. They provide a chess game which is called Chess Titans.. essentially a 3D chess board and the same game though.. but the look and feel you get actually makes you want to play it.. similarly the purble place a collection of 3 games which are totally adictive.. :). The mine Sweeper lovers will like the changes that they see in windows vista beta 2. The graphics, sound every aspect of the game is good.
I really cannot comment on the stability and new features (except that i could see at the first go) . Oh by the way the ie7 that comes default with vista did crash just a moment ago when i was trying to upload the media players' screen shot to my blog. I expect to see more such crashes.. keep you fingures crossed and keep waiting for the exiting journey of vista. hehe