There is already talk that the 10 inch iPad is just the beginning and more stuff is on the way. Here is what I think will happen. The touch screen will be integrated into the MacBooks and iMac. But it won’t work on the Mac OSX side. Instead you will touch something and the screen will flip into an iPad mode. For a MacBook you can then operate it like an iPad or switch and use it as a laptop. They will share files and disk space but that is likely to be it. That way you can carry around a MacBook and iMac as an all-in-one device. Add to that some MicroSIM card and some network unlocking and you will then have a laptop you can use overseas at reasonable data rates. All speculation but it makes sense to me at least.