I don't understand what makes this revolutionary in any way. We already had touch screen technologies. We already had flat screen technology (that was becoming cheap). We already had wireless technology. We have "cloud" computing, but barely anyone uses it with the exception of an odd number of businesses (but that's neither here nor there). Heck, a number of other products already have all that AND a replaceable battery!
I've not played with Macs and Apple products under the hood but, from what I've heard, they're not designed to be tweaked in the same way you can customize a standard PC either. This thing must be even worse. A single anything king of card must take up all the space. I wonder if you can feel the rotations of the CD (oh my blasphemous mouth--DVD) drive.