Depends on the game really, i am using my widescreen laptop as a reference. Most of the games i play offer widescreen resolutions except for diablo II and i think FEAR, the game does appear a bit stretched out compared to my CRT monitor, but its not so distorted that everything looks short and fat. Granted on a larger screen it may seem more distorted, for example if it was like 20'' you may see more distortion than on a 15.4 which is what i have.
Games that look normal on my 15.4 widescreen
Oblivion
Half life 2
Guild Wars
Diablo 2 (with minimal stretching)
Battlefield 2
Doom 3
FEAR
Thats all i've tested, as i said, if you don't go too big with the screen there may not be much distortion, and you could also try forcing resolutions using software or editing .ini files in the games. (i used to do that for rainbow six 3 Raven Shield)
Hope This helps:cool: