No longer can 2 categories work. We need more then "desktop" and "laptop". Now we have these machines which sport full-size keyboards and 17-inch screens, but have low battery life and are heavy. They are much more portable then a desktop, but not as portable as traditional laptops. They serve a very important use. I use one at work, and I bring it home with me every night so I can work there if needed. This is much simpler then having a desktop at home, and another one at work, and there is no way I could stand working off a compact laptop keyboard and tiny screen.