With plasma screens getting Pocket Plasma" on for size. At 3 inches in diameter, it may not be as small as phone, camera or media player LCDs, but this mini-screen can do something that the others definitely can't: You can wear it on your clothes. As Red Ferret notes, the $45 "sound-sensitive" Pocket Plasma will light up io voices and music. For more discreet occasions, the clip-on novelty item can be turned off, displaying only a white screen ringed with a clear glass rim. It's almost as fashionable as a clip-on tie., it might be time to start a new trend and go in the opposite direction (and save a few thousand bucks at the same time). Try the "