As Heliosurge said: There are apprently a bunch of articles saying different things. :7
I have no idea where these articles get their numbers, but guess word of mouth from demonstrators; StarVR's own specs page just lists the rather nebulous "16 million subpixels" (man, how I hate marketing lingo), which could mean 1 pixel tall, and 5333333 pixels wide, for all I know.
...but taller than wide, with 210x130 degrees, would make for some rather Commodore64-like pixels, so I doubt that. at least. :7
@Mazi: I seem to recall Infiniteye/StarVR has in the past dabbled with prisms, to try to shift the image around (...and I believe the lenses were always stacks of fresnel lens sheets, rather than a single layer).
As for now, I would assume their new custom optics (whether single lens, or a more complex train) are designed to wrap the image on a physically smaller display panel, across a larger arc; Every lens segment can theoretically be tuned individually, when one design one's own fresnel lens, rather than pick a symmetrical one off a store shelf; conceivably compensating for things like field curvature, and so on.
Could you outline your ppd estimation model, by the way? Every one of your numbers seems rather high, to my mind.