It's already possible. I have a 2019 Intel MacBook with AMD graphics. It connects to a CalDigit T3 Plus dock via one USB C thunderbolt cable. The dock connects to two 1440p 144hz monitors, a keyboard, speakers, webcam, USB microphone, and Ethernet. The dock powers the laptop over the thunderbolt cable.

I also have an Intel desktop computer with a thunderbolt port. I'm able to switch from my desktop to my laptop with just one cable.

It still has a few rough edges, but overall it works better than anything else I've tried.