I have discovered that I can connect my Surface Book (model 1) directly to my Atom Watt bike and obtain almost full functionality. Maybe this is a know fact already, but I haven’t seen it documented and further all suggestions point to the requirement for and ANT+ dongle. I am not using an ant+ connection and just using Bluetooth. But, compared to running Zwift on my ipad, I don’t see the gear change indicator showing a change of gear. This lack of gear change indicator is also noticeable on my Samsung S9.
I now understand that the gear change icon is only present on the iPad implementation - such a shame. Zwift developers - how about adding this to your list of upgrades? 