[WorldMaker]

I've got a foldable Bluetooth keyboard and my phone supports Miracast, and for brief moments at a time I can pretend I have a weirdly small laptop.

It's a "present"/"past-future" that Microsoft envisioned years back that we have all the technical solutions, just not all the practical solutions. Android is too fragmented to sell such a vision wholesale across the platform, and Apple too disinterested, too invested/stuck in keeping devices to specific niches (because it sells more devices).