You clearly haven't seen a modern iPad Pro screen if you think it's inferior 'in every way' to other portable monitors. 120Hz refresh, super high pixel density, amazing color replication, I could go on. they're beautiful.
What high-refresh rate OLED travel monitors are you comparing it to?
Have you tried using it as an external monitor? It can't even hit 60fps reliably, and there is noticeable lag and compression. As an external monitor, it really sucks.
As a monitor of a machine into its own, at 12.9", I'm comparing it to the OLEDs in the new Vivobooks, which have even higher pixel density, better contrast, very comparable colors, and inherently better motion performance.
What high-refresh rate OLED travel monitors are you comparing it to?