[QUOTE="Alpha, post: 0]I measured and I sit 3.5 feet away from my 19" Sharp 720 LCD, as I like to sit back a bit when I game, as I feel that is more comfortable.[/quote]
OK, so you sit approximately 1m from your 19" Sharp. That would be the equivalent of me having a 57" TV which is roughly what I said I would get when I upgrade. Right now though, I have a 46" TV viewed at 3m, so now define "ridiculous" in this context. Far from being too large, you could argue that 46" is too small.
You said it yourself that you can't imagine sitting 3.5 feet from a 46" TV - nor could I. That's why I sit where I do, and find that offers a good compromise between SD and HD material. It's all about viewing distance, not screen size or room size. Room size may dictate viewing distance though, and if that's the case, you buy a screen that is appropriate.
So, to close my point, it's no good just coming out and saying that a 46" TV is ridiculous when you have no idea how close that person is sat to it. They might well be sat really close, in which case I agree, but until you have those facts...
Oh, and for the OP, get yourself one of the new Samsung LED TVs - they kick out far less heat.