[seanp2k2]

Depends on if you want it to just look good or if you want it to be technically feasible from electrical, thermal, and manufacturing standpoints. Taking all of that into consideration would easily take 10-100x more time than just a novel visual prototype. Even look at Razer's triple-screen laptop from CES; they had one which worked, and one which looked pretty. Getting that last 10% of fit, finish, and feasibility takes a long time too.