The problem with these stores is that while they do sometimes actually supply what you went in there looking for, they also seem to generate new needs. It's a bit of a mystery, really, at which exact point something suddenly becomes a must-have, when until just recently you didn't even know it existed.
In this case - a portable DVD-player - I think it was the combination of my extreme tiredness lately, and the fact that I happened to find one with 9" screen (instead of just 7"), and TV included.

I have sometimes made use of the laptop to watch a DVD in bed; but the problem is that the computer tends to be more interested in wandering off out onto the internet to look for updates than to watch the film. Then either it suddenly turns itself off to restart without warning (leaving to me to remember where we were); or, if I have managed to turn that possibility off, it takes its revenge when I get tired and want to go to sleep, by then saying "no not yet, first I need to..." By the time it is ready to go to sleep, I'm usually wide awake again!
What I expect from my new bed companion is that it will be more responsive to my immediate needs. Moreover, I also expect it to sit and chat with me in the kitchen sometimes, while I do boring housework.
The ideal invention for the future would of course be a machine that actually does the boring housework while I do the sitting and chatting... (Maybe in the next decade...?)