Slick! Great job. This reminds me of my ideal dream setup.
You can spend a down payment of a house on a brand new Mac Book Pro, and the second you plugin a second monitor or "Sidecar" to an iPad screen the fan will go insane with all your Electron apps open. Basically unusable for day-to-day use or annoying.
What I really want is in the territory of this demo. Let me just "Maincar" from my iPad (or even iPhone) into a decked out MBP / Mac Mini sitting somewhere in my house in a cool spot where it can be as loud as it needs to be.
The speed of Sidecar is incredible - so I imagine this will work. This way people can stop dealing with MBP hardware and have a slim quiet quasi-touch setup with the beautiful iPad Pro/iPad Magic Keyboard.