It would be nice to be able to have bunk beds, shower/tub combos, etc. that face the other way. For instance, a bunk bed with the ladder on the left side instead of the right, or a shower/tub combo with the curtain and shower head on the other side, like a mirror image.
With that being said, doors should also be able to open both ways on both sides of the wall. I noticed that doors only have the hinge on one side, and rotating it just makes it open the same way but on the other side of the wall. Maybe rotating it could keep it on the same side of the wall, but switch the hinge to the other side?