There are some pretty fundamental problems with this, but I love anyone trying to rethink the essential user interface. It’s a fascinating subject, to me, and one I’m not nearly smart enough to contribute to. What I can do, however, is nitpick about how this one isn’t good enough. Fundamentally, any restriction on organization is just that, a restriction. An option to organize windows like this is cool (an awful lot like the Pre, bee tee dubs), but it tells you to do things one way, and I will always prefer my way. They might instead consider organizing multi desktops like this instead. By way of simple example, my main screen often has one window, fine for this GUI. But my second screen might have email, 2 or 3 calculators, a gaussian calculator, winamp and/or Miro, and occasionally extra info a text editor or something. Multitasking isn’t about only about having multiple things running, it can be about using a lot of information at once. But I don’t really think the window organization is the point here, honestly, it’s more a trick than a revolution. The separate multi touch interface is the difference, and that requires use to convince me. I don’t like having to have my hands on the pad at all times to know here I am. If I want to click somewhere, I first have to lay down my hands, find where I am, then move to the right place and do my business. Seems kind of awkward, especially if I’m switching to a keyboard (separate or virtual on the pad, they don’t address this), but maybe it would work wonderfully with practice. Maybe the screen gets imaged to the pad so you can know what’s where, though that obviously requires moving your view. I dunno, it’s cool, but give me the minority report interface that actually works and automagically knows what I want, then I’ll be happy!