It’s surprising how much of a difference context makes. If you took the above room photo by itself you would see nothing strange in it. Just an ordinary photo of a room. But add the context of it being a poster for a horror movie based on a Stephen King story and suddenly you see monsters creeping in the shadows just outside the frame.
Still, I think this poster is a little too subtle. It might have benefited from some creepy elements in the room itself we could latch too. Doesn’t need to be nothing major. And not knowing the story the film is based on I’m not sure what would be appropriate. But I’m sure they could come up with something that made the room feel a little off by itself, without any need for a larger context.