well it depends whether you are watching dvd's with mates or not! laptop screens are such that there is only a small angle where the screen contrast is acceptable, with a decent machine (or just a decent monitor) then dvd's are much more enjoyable.
Playing games is also not a good idea on laptops because of the ergonomics. If you plan to have a heavy game playing session you will KILL your wrists...i did so in one day where I was incredibly bored so played on a laptop all day, after which I had my wrists in supporting sleeves for 3 days