Touchscreen? Check. Live TV? Check. Video and MP3 playback? Check. We got some new shots of the LG Vu/CU920 with its fancy-sexy UI and cool styling. It also includes a 2-megapixel camera, full HTML web browser, and should drop on AT&T this year. How does the TV work? As far as we can tell it’s streaming live from AT&T’s servers, so it’s not exactly like that old black…