But it is a fundamentally different type of problem. Going through a router imposes hard bandwidth limitations at a central point.

With direct wifi, each monitor only needs to serve a single user, so the devices can be lower powered -- the broadcast only needs to serve ~a single desk. And they are centrally controlled by the IT department, so unlike a wifi router the in RF mad-max anarchy zone that is a modern apartment building, there shouldn't be concerns about noisy neighbors.

I'm not sure there's a point to all this -- the phone being used as a computer is probably going to be plugged in, so why not push everything through USB-C/thunderbolt nowadays? -- but it is almost certainly possible.