Biggest single issue would the set being HD "ready", IF you're using an off air antenna for reception.
Second issue would be the picture quality by comparison to the flat panel as most old RPTV's were not capable of 1080P, and that will make a difference on much larger screens.
If either of those are not a problem, you're good to go.
BUT!
Personally I would go with a conventional CRT RPTV over a DLP or LCD model due to the need for replacing the bulbs in either, and the fact that if the color wheel goes out in the DLP, it's pretty much done for.