Comparing wearing headphones to all the technology you need to use vr to get things like a virtual handshake is something, I guess. Unless you can make the technology stupid cheap and as easy to use as a webcam (which is the technology you're trying to replace here, and requires basically no effort on the user's part whatsoever, remember), it's never going to take off in the way you're imagining.
I absolutely love my psvr and I'd buy it all over again just for re7 alone, but it's not going to ever take off in the way you're imagining while it's still something you have to actively wear beyond maybe a light pair of glasses, and even then I'm doubtful. People are always going to value comfort far more than those minor things like a pretend handshake you mention.
All the technology you need to use VR.. like what? A headset? That's it. We're also talking in a decade-long context at this point, so it's less a box strapped to your face and more like thin goggles or a thin visor, which would actually be
better for your eyes than a monitor.
So comparing thin goggles/thin visor to headphones is actually very accurate, however it favors VR much more as VR is a general purpose device like personal computers, not just a way to get audio.
How stupid cheap are you talking? Because your £50 comment is undervaluing the hardware. If we're talking £200 then fair enough, but even that isn't really needed as there are a number of general purpose technologies that go mass market at higher prices.
You say people will always value comfort, and while that's largely true, the good thing is that once VR actually is down to a pair of glasses or realistically goggles/visor, it will have certain comfort benefits over other displays.
Your experience with PSVR is clearly focused almost entirely on gaming, you haven't had the same experiences I've had on PC. Gaming is only one of a dozen sectors that I'm involved in with my headset at home - I'm also aware of how the technology is advancing and solving it's issues including comfort. This doesn't seem like something you've looked into.