Check this out: https://homey.ink
Hadn't heard of Homey.app that that's for, but yes I guess what I'm suggesting is that Paperd.ink could be a good 'that, but for people that DIY with HomeAssistant/OpenHAB/whatever'.
Using a Kobo eReader on the other hand is a great purpose for when you’re not using it. Now when I leave for holiday I just take it from the wall :)