Actually, you don't have to take your laptop around with you either. Just download all your movies onto an external harddrive or a flash card and you're good to go.
*neither are financially reasonable... yet... nor 100% compatible with systems across the board... yet... But the point still stands that it can be just as easy, and the across-the-board compatibility issues are slowly becoming less an issue.
SW-5120-1900-6153