Ran across a new product from Intel. it looks small enough and low power enough to be useful in a robot.
Intel computer on a stick.
Can't verify for sure it can run ARC but reads like it should.
Price appears decent too.
https://www.mouser.com/ProductDetail/Intel/BOXSTCK1A32WFCR/?qs=sGAEpiMZZMuCJ3asIKVASnagCm4Y5pBFHxaa2kD0ba9jGCy1Btud4g%3d%3d . Product data sheet.
https://www.mouser.com/pdfdocs/Intel_ComputeStickProductBrief.pdf
I'm trying out Vensmile mini computer but The Intel computer stick seems very promising as well.
You have to add an HDMI emulator to fool the GPU chip into thinking its connected to a monitor when you have it on your robot platform so you can run your programs.
We are living in amazing times when you can access powerful computers and programs like ARC in a very small package. Kind of scary when you really start to think about it.