This set of ideas is probably most easily commercialized as a USB-C dongle with a fuckload of ports (including display inputs) that you can then connect to any

This set of ideas is probably most easily commercialized as a USB-C dongle with a fuckload of ports (including display inputs) that you can then connect to any laptop you want. For bonus points, the dongle could include port-testing functionality, and a webserver, so you plug it in, browse to http://dongle http://dongle, and see that your Ethernet port is fucked.