Yes, i agree with you about the improvement they have but right now it is far from becoming mainstream. I checked htc vive pro price after you mentioned and it is 1500$ in my country which can't afford from the major part of the population.
Still, with time prices will be cheaper and more and more people would have the devices. A platform like CosmosCR can make headsets more appealing.
The HTC Vive Pro is intended for enterprises, not for consumers. Think about VR arcades where headsets are worn by a lot of different people. It is a little more sturdy and easier to fit on your head.
Oculus is leading the way by getting rid of the wires and external tracking sensors, focusing on better optics for a larger sweet spot, and empowering mobile VR so consumers do not need an expensive computer. Their next headset will be a combination of the mobility of the Oculus Go and the tracking of the Oculus Rift.