hard to say
i play my 360 a lot, i play it added up probably 6-10 hours on weekends or when i don't have school, some of the time it spends just on sitting at the main screen of a video game. Well, the heat problem with the 360 I know is due to the use of bad solder on the 360 and the GPU. The GPU generates a lot of heat sitting right under the dvd drive and it doesn't have a fan properly situated to really ventilate that heat. The GPU is at the bottom of the 360 which is why i think the laptop cooler would work well.