Paper prototype is new revision.
It's a board I designed to use the Compute Module 3 alongside Kite's SAIO or Helder's AIO board. Essentially, its a little bigger than a Pi Zero, but way thinner than a Pi 3 and it replaces a Pi Zero in a traditional build. The best part is that you don't have to rip up a Pi 3 to get that kind of processing power in your build.
If you'd like to be one of the first people anywhere to build a Game Boy Zero with a Compute Module (Lite), sign up to hear the pre-order announcement here: https://goo.gl/forms/8ulRBxGxtxJ7o5TV2
You can make a Helder, Custom, or Kite SAIO build with this. I recommend a CM as opposed to a CMLite for any of them.