The white breadboard in the picture is 4.3 centimeters along the wider side. One day in the not-too-distant future a Plasmoid will live on the above device and I will be able to access it using Bluetooth and then control the device from my Plasma desktop.
Rob L. and I put some more work into the wire protocol and looked further into what will be needed to integrate it with Rob Scheepmaker's remote Plasma work. Rob L. wrote some code for the device and we got a couple steps further.
I have no idea if this idea will ever see the light of day in a commercial product, but I also don't really care to be honest. It's a fun hack that I'm spending some of my free time on and it stretches Plasma out to a whole new area. Wheeee for having fun. :)