Surface we were impressed. Then, when they later showed off SecondLight, we were even more impressed -- and then were sorry for anyone who had made the considerable investment in one of the earlier, singularly-lighted tables. We're feeling better now (thanks for asking) after seeing a video demonstration of XRay, a mobile app from Stimulant (who earlier blended a Wii Balance Board with a Surface) that provides similar functionality; letting you effectively see secondary images on the touch-table. The app relies on the ability of the Surface to detect where the phones are, communicating that position to tell them what to display and in what orientation. First up was the iPhone, as seen above, but the app has apparently already been ported to Windows Mobile and Android, meaning most-anyone can get in on the action -- assuming they have both a smart table and smart phone. A-ha-inspired video included below for your '80s flashback amusement.