I use my laptop for gaming; HP Pavilion Entertainment PC dv9628nr. Admittedly I’m cut off from stuff like Assassin’s Creed and Bioshock for the moment, but I can handle stuff like Psychonauts, Tomb Raider Anniversary & Legend, Half-life, HL2 and Portal as well as the mods for them, provided I use lower settings.
Letsee, with Half Life I can get a pretty solid 50-70fps even on the highest settings, with the low settings for HL2, I’ve apparently gotten as high as 200fps provided nothing is happening on screen, but that drops down pretty fast. I can’t recall too many points where I dropped down lower than 30fps, and it normally runs around 70fps as well. I could probably stand to boost up my model and texture detail, but I’d probably end up having one or two points through the games that would drop below 30fps if I did that, and I just can’t put up with that in FPS. I’ll take the lack of detail over low fps any day, since the latter actually affects the gameplay.
Ultimately though, with all the mods that I can run for HL and Orange box, I don’t feel at all cut off by the lack of power my laptop has, but what I really enjoy is the mobility of being able to play my games anywhere.