I was thinking the exact same thing but with a PS3, and my friend Kyle said getting a Laptop would be better because I'd use it more. I kind of agree but if I was saving up for a PS3, I'd be saving for a PS3, meaning a Laptop really woudn't really be in the list of options of things to go for.
But yeah, if you're really into being a geek and lulz-pwning people on Halo 3 then get a 360, otherwise if you're cool (like me), get a Laptop, but a good one! Because we all know how we love to play the latest games on our laptops that we can go anywhere with, like a gaint NDS, although it can do almost anything, just not physically.
I mean, for instance. I'm getting a PS3 because I'm getting FFXIII and MGS4 and GTAIV, so getting a laptop is not an option. Only get a 360 if you know exactly what to get!
Edit - Just looked upwards, thanks for killing my post John!