It would be cool to integrate my head unit, such as a Wahoo Elemnt Bolt, into Zwift. Or rather pair Zwift to an Elemnt.
To explain further, when I go for a real ride, my speed/cadance, power, and heart rate sensors pair to my head unit so I see the data on the handle bars. Then I can connect my phone to my Elemnt via the Wahoo Elemnt app to receive txt messages on the bike computer. What also happens when my phone is connected, I can also see the data in the Elemnt app itself, so there is a by-directional flow of data happening with the phone, I think, at least the phone app gets periodic updates somehow.
So the requested feature would be to add the Zwift over BLE (Win 10 and Mac) to the head unit as device (much like a phone), and maybe Zwift could see the same sensor data that the head unit sees. Provided head unit capabilities.