Wired's artists seem to have a very good idea (of the profile at least) of the new MacBook. The frontal is a little bit weird and we aren't sure why it is so light - but the side view is very close to what we've been told.
Remember, for this thing not to fall over - a lot of weight needs to be put on the bottom - meaning battery and SSD. However, Apple might have put the mothrboard behind the screen to save some space. Also, if it folds all the way around 360 degrees it could make one helluva tablet.
Just saying is all.