I use a front projector full time as my TV. It came with an extra bulb so I have never had to buy one. TV gets used about 5 hours per day over the last 3 years. We love it. But you do have to be able to keep the room dark. If you like watching TV with the window open, then it's not for you. A good 1080p FP start at about $2000 and can give you over 100" of viewing goodness. The $2000 it saves you over a 65" plasma would keep you in bulbs for a lifetime.
(Note: The room does not need to be pitch dark. Just not lit up like a greenhouse)