Wow, I expected some unreasonable price. But, no, the hackerboard is only $15. I plan to wait to see what other folks do with them though.
In other news I ordered my MK4S upgrade today. Fun times.
GPIO "Hackerboard" set | Original Prusa 3D printers directly from Josef Prusa https://www.prusa3d.com/product/gpio-hackerboard-set/