I've always thought what it would be like to have a DS game on a widescreen TV. Then I thought it would be neat if there were a feature to display the game sideways on the screen, and one could have like a stand or wall mount that you could unlock, spin, and lock into place where the long portion of the TV goes vertically. Then a Wii Remote or PS Move controller could be used for the touch portion. It seems so ridiculous, and yet it would be so cool.
Playing those old vertical-screen arcade games like this would be awesome, too.