It's not a made project at this point, just an idea, but I think that tingbot's form factor would be perfect to control a 3d printer!
I think this could be done as a tide application, even if it need to embed some non python tool (like octopi) but I really think that would filled nicely the job!
The only "bad point" is that the Pi does not allow to insert SD card, but at least we can use USB keys.
I think I will try to make such an app that will allow either to direct control a 3d printer, and play gcode files! (with optional network remote control)
Is there is anyone that would be interested in such an app?