If by next vita, you mean dropped by sony within a few years, then yes.

No way. It won't even come close to the sales numbers of the Vita.

More like Sonys Virtual Boy.

This is nowhere near first gen. The Virtual Boy came out over 20 years beforehand.

no, the Virtual Boy is not a VR device !!

it doesn't do headtracking at all, so the VR experience of having the world all around you is inexistant with it - all it does is give each eye a separate picture making it a personal (stereoscopic) 3D viewer

even VR HMDs from 20-30 years back had simple forms of headtracking

Well, it was marketed as VR. Obviously it was going to be a lot more primitive, because attempting a consumer produec like that at that age would have been way too expensive.

There is a serious supply chain issue with PSVR, so it's hard to tell how it will do when actually available.

I would not be surprised, Sony being an electronics manufacturer, that they are already working on PSVR Mk II. That would explain everything.

ofcourse they are working on it, the tech will improve 10 folds within just the next 2-3 years with eyetracking becoming viable (> foveated rendering to significantly cut down on needed processing power, having the world react to your gaze), with higher resolutions screens and more powerful hardware being available at mass market price points (> much better picture clarity), with higher grade motion sensors that make tracking more robust and possibly even wireless tech having enough of a performance and reliability jump to be incorporated into VR HMDs

but even in more traditional electronics markets that don't see as much technical innovation it's normal to work on the next gen once you push out a product, Nintendo better be starting work on a Switch successor soon even if that won't come for another 6+ years

PSVR is an investment in things to come; cutting their teeth on the tech and design language while getting in on the ground floor of the medium. I see this incarnation as the trial run so that they can be experienced and prepared when mass market hardware is ready to do it right (better and cheaper). I don't think it's important to Sony that PSVR 1.0 is wildly popular and successful (how could it be at its price and requirements?) but that they build a foundation for when the technology matures. PSVR in the long run will be as successful or unsuccessful as VR itself.