Look at this. 3D Arcade has been around for 10 years.
http://www.youtube.com/watch?v=L0p39j9Txqk&NR=1
The advantage of RetroCopy is that you can play games in the 3d environment. You can't do that in 3D Arcade. Also, the interface is user-unfriendly, another plus for RC.

Technically, in some form or another the idea of Retrocopy has been around forever, but Retrocopy is the first to actually do it. I can tell you countless games where a mini-game room was an arcade or whatnot.