I would like to see someone engineer a pancake version of the best components and make a "Slabtop" computer, basically full-speed, full-size components, all arranged in as thin an array as possible, with flip-up screen.
It could be briefcase-mounted, so it was possible to carry by just shutting it like a briefcase.
With carbon fiber components (conductive) instead of steel or aluminum, it could be fairly light.
The briefcase gaming workstation. Some would, of course, prefer the "Samsonite" sized model.