it hasn't, if you have to scroll bars on one screen when you scroll down to go right for instance both scroll bars scroll i.e. weather app, now the developer preview didn't play nice with my magic mouse, but the consumer preview does, which is nice but a simple short slide moves it far oh and btw... if your testing try searching the store i had move to the bottom right to get a tool bar then search then choose what to search then search :o

that being said..

I've seen win8 on a tablet(video) and it looks awesome i think they got something here, though why even have the windows part there? i mean its a nice thing to have but battery life?