Since then, I've put insulation in the wall (to keep it from sounding like a drum when I thump on my desk) and attached plywood to the backside. All the room electrical is in the wall, and all the shack electric will be done surface-mount in conduit, to accommodate changes updates etc. as the radio part of the shack takes shape and changes in the future.
In case you are curious, the wires coming through the wall in the third picture are some temporary cords for things that are on the shelf in the ham shack - the first is a light, and the second is the small coax for a cellular antenna - my shack is basically a concrete bunker, so I had to put in an external antenna and a little booster-amplifier to bring cell signal down into the space.
Another thing worth pointing out - in the first picture above you might notice the large junction box. Inside that box is all of the AC circuits that will eventually be for shack stuff, coming from the breaker panel above it. This way, as I add equipment, I can run conduit from this box, to wherever I need it, to get the circuits where they need to go.