The trouble with that is you get perspective error... since computer renders the scene for flat presentation. When you rotate your screens the are off by the angle they hold. For some games it's hardly noticable. For some, you notice it quite easily, likely depending on Field of view the game renders at. Curved screen would be better if the scene could be rendered for "curved camera"... which afaic is not done anywhere so far. This 'angle' problem is first addressed by nV with Pascal cards, which can actually render for multiple cameras. Haven't seen how well that works though so...