If your video card doesnt have tv-out, you can use a scan-converter.
(Im using a Kyro2 with tv-out but Ive used a tivo converter in the past & it worked pretty well)
You will be stuck at 800x600 as said earlier, you can game in higher resolutions but if you set your desktop higher than 800x600 you'll have a heck of a time reading fonts & the edges of your screen are cut off.
I am typing this on a pc hooked to a 36" Sony Wega (the one in my sig my "main" pc).
The wega has edge sharpening that makes the fontts at 800x600 very readable.
And Ive ggotta admit, Max Payne on a 36" screen is a blast.
As a matter of fact, I moved my Anachronox save games to this pc so I could sit on the couch in comfort while I play.
Dont get me wrong, a tv is absolutely "NO SUBSTITUTE" for a monitor but I do find myself using this pc more & more.