Yes I saw the ones at CES, and I like mine better As for making and selling . . . .
Raspberry Pi - $100 (inc HDMI and Memory Card)
Monitor - $220
Wood - $100
Extension Cable - $50
USB Extensions - $40
French Cleats - $50
So $560 not including all the sundries (small brackets, screws, Shellac, Varnish, Glue, Sand Paper etc), I also had to get the corner clamps, some chisels and a mitre saw, so all in all its prob cost me nearly $1k to make.
Note - All prices in $ CAD