No, it means that the information in your room *could* be encoded in a 2D area proportional to the area of your walls.
If your room is a cube, you could double all its dimensions which would make its volume 8x bigger, but you would only need 4x the area to encode its possible contents.
Alternatively, you could increase *one* dimension by 8x, which would also make its volume 8x bigger, but you would then need 5.666x the area to encode the contents.
This doesn't actually happen in our universe - your walls do not contain the full information of the contents of the room. It just means there is an alternate description of volumes in our universe which don't require as much information, proportionally, as you'd think.