While the project page states this is work in progress stuff, the photos showed a working prototype so I reached out to SNC from yarh.io to ask some questions.
The name is quite apt, because THEBRICK, this Raspberry Pi 4 based cyberdeck with an impressive 7.9" wide screen and an integrated mechanical keyboard, folds up into a… well.. brick.
Other projects on yarh.io, which btw stands for [Y]et [A]nother [R]aspberry [H]andheld, come with source files so STLs for THEBRICK will be released too once project development is finished.
The keyboard part of THEBRICK is a "Plastic Preonic", another project available on the site, which is a 3D-printable version of Jack Humbert's well-known design – with open-source case/plate files.