Don't know why this was revived, though I'd still go with a laptop. More expensive, though ultramobile laptops are easy to carry around and still don't take a lot of space--plus they can do so much more, whether it be Mac (MacBook Air) or PC. That's why I don't buy portable consoles anymore--just take a laptop and a USB mouse and I've got all my shooters right there.
And if I wanted to watch movies on the go, I'd take my portable DVD player. DVD's are less expensive, there is a much, much bigger selection of DVD movies, and if I wanted to watch a movie, I'd like a screen I wouldn't have to squint at.