RE: GPD Win Max 2: It's Finally Announced

You seem to understand which use-cases will fit a device like this, and what alternatives are there for each use case.

Any clunky wires for power? Battery?

Since it's not released yet we can only speculate, but it seems it won't need a lot of wires. It should have a good enough SSD installed, and it has two SD card slots so no need for an external HDD. It has bluetooth so if mouse is necessary, it can be connected wirelessly.

If it's like the older GPD Win Max, it should have a USB-C charger, and it should at least 3 hours of up-time, which isn't much for a gaming laptop but is for a handheld.