We were quite bedazzled by the HTC Incredible S after our hands-on at MWC, but it's the auto-rotating icons for the capacitive buttons that left us most intrigued. So we went back to the HTC booth to try to make sense of it all. From what we were able to observe, there's some optical trickery happening here: the icons appear to be glittering and shimmering depending on viewing angle as if lit through a prism, half-mirror or grate of some kind. We think that a pair of LEDs are used to project the intended icon onto the glass surface via eith
