Macsen has this problem and unfortunately he's in hoslital quite a bit... It took a while but we found the perfect piece of tech to entertain Macsen. We found a pocket projector that we connect to his iPad to project into the wall:
Or ceiling if there isn't a wall to use:
For less than £250 we for a projector, iPad connector and a clamp. Now all the other kids are jealous of Macsen as they share their 15" TV while he has a 60" screen on the ceiling!