One option in the future is to use the directional sensors in our smart phones to control steering. If the phone were mounted to the bars, then turning the bars could steer (within limits) in the game. This function could be enabled or connected through the Zwift phone app.
This is coming. I’ve personally had this for over a year now and it mostly works well on my specific phone, but we’ve not really validated how it works on the whole slew of android and IOS devices, nor do we have the game code that really handles keeping people from doing things like cycling under the ocean. It’ll take some time before it ends up in your hands.