Well, actually this concept applies to any suitable enclosure.
Just add an handle and display of choice…..
As example,
my CAD-workstion converted in 2013 for mobile use.
@wottle creations ive not seen yet.
Link?
Indeed, any logicboard can be used here too.
I like the idea that its now become modular and stackable system. (like
@retr01 suggested in the first place)
Ticker and thinner and contour can vary a bit to fit the largest board.
The version with a display is actually kind of logic.
So, should I actually make one?

(Edit:
@wottle -as for a carrying handle,…
Its optional, yet to be determined….can be added to the top /bottom/ backside in various ways.)