Let me explain just a little more . . .
The wall mount frame is attached to the wall with little "L" brackets screwed into wall studs on the very top of the cabinet, and the very bottom under the mattress area. Then the pistons or springs are attached to the insides of the cabinet.
With floor mount, the front part of the cabinet that holds the bed frame is actually attached to the floor. In TV with all the floors being on a concrete slab, that may not be possible.
There is also another option besides the tall "cabinet" look. A bed that opens horizontally, so that you can put an artwork above, little knickknacks on top of the frame. This would work best with a twin bed:
