3D graphics and a board-agnostic Hardware I/O library that just talks to mainline kernel interfaces was the hard part.<p>Adafruit did a video hinting at what this could be used for: <a href="https://learn.adafruit.com/processing-on-the-raspberry-pi-and-pitft/overview" rel="nofollow">https://learn.adafruit.com/processing-on-the-raspberry-pi-an...</a><p>Your comments and suggestions are welcome.