You can try ALVR instead of virtual desktop. It is also a wireless VR server/client system that for me at least works better than VD.
It uses Steam VR but doesn’t need the game to be in Steam at all. The key to getting all this to work good is your wireless setup. It’s best to have a 5gHz modem close to the headset. The latency can be very good, less than 70 ms total.
The graphics quality is still similar to the link cable though. It’s your GPU that is rendering the frames and then those are encoded and sent over wifi to the headset which decompresses and displays. With the headset doing the warping, it actually can perform pretty well.