They'll be talking about the new iTablet killer, the ZuneTablet - which Microsoft will start work on the moment they have a prototype in hand (read: the day the iTablet is available at their local Apple Store).
Already in concept. Microsoft Courier. And if they manage to bring to market the concept they've been throwing around then I'll most likely be more interested in that device over this one. Though not everything has to be an Apple product killer, it can simply be a competing product. Like Android phones. No one phone will take down the iphone, but growing support for a platform sure might make a push towards taking away some of the iPhone's fame (but who are we kidding, not really).
That said, any of these devices without pen input is just a waste. That's a big blank canvas for me to draw on, I want to be able to do so, and so would a lot of other designers.
As for the images go. I had a feeling there would be know what Apple would make it to the keynote without ONE leaked image. Whether its fake or not we are looking at something besides a render, and a design that any of us would have pictured as the tablet. A big rectangle, big screen, black border...how hard was that.