I'm no expert, but to me "cyberdeck" is somewhere in the realm of DIY computer that breaks from the traditional form factor. Of course they still aim for practical - but the whole point of cyberdeck is to embrace the imaginative.
In short, I think of it like a technopunk cosplay for your computer.
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but the barrier of entry is super high, so, not that many people end up making one - let alone refining the idea as needed to really polish it.
It's a bit bigger than these HP, but it is open hardware and stuff has been mainlined into the kernel.
MNT Research is a very cool open hardware organization. Everything they make is incredible.