I can tell the difference between 720p and 1080p from 10 feet relatively easily on a 50" I know this because I just saw my cousin's on Thanksgiving and it was relatively apparent to me. That said, I'd STILL recommend a 720p 50" Plasma to my 'rents over a similarly priced 42-46" LCD 1080p. Why? Because they're old. Their first TVs were 10" B+W's with 3 channels. Do you REALLY think they're going to care/notice the difference between 720/1080? Not if they're average consumers they won't. Like it was said earlier, they'll appreciate the larger picture over the higher resolution.