I came to TAG right at this moment to post something about the Gizmodo and you beat me to it by 20 minutes Ellis!
Someone did a tweet with this video. They need to go beyond this though. It looks like they supply the ballpoint with the installed plotter. The plotter needs to be a clamp on . So I can use a blackwing or whatever.
Yeah, right off the bat it seems like just drawing in pencil, (or whatever your choice of implement is), and then scanning it in is a better way to catch all the subtleties of the tool.
It's sensitivity and recording ability that goes into trhe vector will be interesting. You can convert any line art into vector art in photoshop by making it a path. Something I really like to do as a trick to do clean line art. But it asks up front for the accuracy you want in numerical degrees of precision. It will be interesting what this onboard program of Wacom produces. Of course this work's primary purpose is to be imported into photshop. It does leave behind an analog record as well. That's fun.
The vector conversion and layers are interesting, but I don't think this has much of an advantage over a scanner. Vector art based on ballpoint pen drawings won't be too terribly useful, but I have to admit it would be fun to play with... but that's all it is, really... a toy to play with.