By coincidence, I happen to be using a 55" touch screen right now (an LG HDTV 1920x1080 with a PQ Labs touch overlay). It's actually pretty usable but I do feel

By coincidence, I happen to be using a 55" touch screen right now (an LG HDTV 1920x1080 with a PQ Labs touch overlay). It's actually pretty usable but I do feel neck strain a the end of the day.