I admit it, the ModBook is pretty sweet. It’s an after-market Mac made by Other World Computing and Axiotron. The basic idea is simple: they buy regular MacBooks from Apple, take them apart, upgrade and reconfigure certain pieces of hardware (including adding a stylus-sensitive LCD screen and an optional GPS unit) and put it back together in the shape you see there.
It doesn’t have a keyboard, but I suppose the idea is that Inkwell should suffice when you’re mobile, and if you have to plug in an external keyboard, you can. People who buy these probably aren’t getting them to type papers, anyhow.
So if you need a “tablet Mac”, there you go! Unfortunately it comes at an $1100 premium over what an identically-configured MacBook would cost, but MacBooks don’t have stylus-sensitive screens or built-in GPS, either.