My two-year-old LOVES videos, and although we don't plan to spend much time in the room, putting on a video will help him wind down and relax before an afternoon nap, and might help in the evening if we have trouble getting him to bed in a strange environment. Not to mention giving him something to occupy his time while my husband and I shower and get dressed in the mornings. If we can't get one, then we can't (it's not worth bringing one-- we're flying into Orlando). It would be a nice extra to have, that's all. Disney World is a super-stimulating environment, and it would be good to have some familiar videos for him just in case.
I know there is 24 hour Disney channel, but most Disney movies are not appropriate for 2-year-olds.