Not just a cyberdeck.
See saveitforparts' video on making his own FEK for a lot of good ideas.
The idea is: portable compute with expandable I/O, along with some storage for tools.
Tough suitcase-like enclosure with asymmetric depths (thinner top for display/compute, larger bottom for keyboard + storageā¦)
Power consumption is a priority because of portable portability constraints.
An ARM device makes the most sense, however for x86 compatibility low-power variants exist such as Intel Atom CPUs.
Needs to be rugged, ideally water resistant
Capacitive touchscreen is preferred