Doesn’t hit all your requirements, but its closer than it is far away.
General shape of a laptop.
Does have ports, keyboard, and touchpad.
Not a DP screen, doesn’t have swappable internal battery packs but you could… slap kinda pouches or straps to the housing, and carry some external batteries or a mouse in em, plug em into whatever ‘dock’ / usb hub this thing is using.
https://www.techeblog.com/cyberdeck-steam-deck-portable-briefcase-game-console/
Doesn’t hit all your requirements, but its closer than it is far away.
General shape of a laptop.
Does have ports, keyboard, and touchpad.
Not a DP screen, doesn’t have swappable internal battery packs but you could… slap kinda pouches or straps to the housing, and carry some external batteries or a mouse in em, plug em into whatever ‘dock’ / usb hub this thing is using.