If you want another screen in a portable setting, there are tons of portable monitors out there, many powered and driven entirely over USB-C. I found a 2k option on Amazon for ~$100, it's about as thin and even lighter than the macbook air I use it with. Works great.
This seems unwieldy and pricey for a gimmick that may not be easily serviceable.
This seems unwieldy and pricey for a gimmick that may not be easily serviceable.