Indeed, which makes me hopeful it will at one point be viable to DIY a cheap, low-wattage computing/hacking device, based around an SBC or a beefy MCU. I haven'

Indeed, which makes me hopeful it will at one point be viable to DIY a cheap, low-wattage computing/hacking device, based around an SBC or a beefy MCU. I haven't done a full sweep of the e-ink landscape in a while, but the consensus a couple years ago was that all the low-latency solutions are still on the expensive side (you're better off with a regular screen).