DLT one (Damn Linux Tablet) - keeping an eye on this modular Linux tablet project on Hackaday
https://hackaday.io/project/164845-dlt-one-a-damn-linux-tablet
Two system-on-module (SoM) are being evaluated, ideally both will be supported. One has a similar SoC to the Purism Librem 5, the other is a Jetson Nano.
How cool would it be to have a modular tablet chassis, similar to the 24 year-old ATX standard for PCs?