and check for over/underscanning... I plugged my 32" in to try it out, and was missing half my start bar width, all around the screen though... tried everything... till finally discovered my TV has a overscan automatically turned on, so that went off and Watched a replay of a Starrcraft 2 game I had... looked terrific.
Cons:
Unless the TV supports a range of resolutions, (mine supports like 6 from 800 x 600 to 1920 x 1080) you need to use the native res of the TV, otherwise thongs wont look right, or not even work.
Power, TV's use more power than monitors, (don't know, but it'd be ridiculous if they used less power) So don't be using it just for facebook updating and reading e-mails.
Because the screen is larger doesn't mean it'll be better quality, whether its a 22" or a 32" 1920 x 1080 picture, both screen sizes have the same amount of pixels. might even look 'worse' (but not so bad that it'll deter you from using it, look at the PS3 1080P gaming on 40"+ screens still look great.
Like Randyman said, try it out...