No.

I like wires. Wires mean infinite power. Portable energy is the absolute bane of my existence.

I could imagine a briefcase that opens and origami unfolds 3 monitors - the problem isn't the motherboard, the screens, or even input devices... hell, if we wanted, we could attach a little thermal printer just because!

The problem is our energy. Aiming for performance per watt, which means tuning to application.

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Bypassing the PSU with battery and going directly DC into your components could save some energy. This might be a fun side project to mess around with an old mobo and some lithium-ion batteries. Still need inverter for monitor afaik.

I really wish fuel cell technology were more available because this is a nearly perfect use-case.