Fad or not, it is the best gaming experience I have ever enjoyed. I would gladly spend $600 every 2 years for more advanced tracking, controlers, and display. In fact I would be willing to spend even more. I hope we get a steady stream of new hardware, headsets, trackng devices, and controllers. 

Just like new more advanced Blu-ray players, Phones, TV's, Stereos, ect. come out every year. I think the same thing should happen with consoles, vr headsets, tracking systems, and controllers. No one has to upgrade every year, some can upgrade every 5 years, some would upgrade every 2, but we would constantly have growth and improvement.

I can see so much potential and growth in this industry, that I feel like I am 5 years old again, and anything is possible.

i.e. you are a rich early adopter. I'm an early adopter too, certainly not as rich as you, but I can afford a few things. VR is not for me though. If it was, I'd definitely get Vive instead of PSVR.

that's a good thing, as it means there will be very meaningful progress in VR capabilities, that clearly deepen immersion by offering a better image (resolution, framerate, field of view, ..) and improved interactivity (eye-tracking/reactions to player gaze, better hand/movement tracking with less hassle, maybe even wireless connection,..)