HP’s new DreamScreen 400 is one of the best-designed touch desktops to come along in a while. Running a custom Linux distribution, the DreamScreen 400 has a UI designed from the ground up around touch. It’s quick, responsive, and comes pre-loaded with the hottest movies, music and programs. The downside? You’ll probably never see it. Hands-on with the $400 HP DreamScreen 400 (4/1/2011).