A prototype of a Vibration Reduction (VR), EDG scope was in a case at the Birdfair.
In common with much of the Nikon stand there was no information about it whatsoever.
They didn't mind me taking a photo of it on my phone.
Yes, Nikon certainly has the know-how to make such a superzoom lens. I think Kowa made a good effort to meet the needs of "birders" who are more interested in photography/digiscoping than visual use with its photoscope. It's what Nikon should have done/should do, only better.
Real "magnification" has nothing to do with a camera. Perhaps you mean the "effective 35mm focal length"? That really depends on the lens compatibility with the eyepiece. I suspect the Nikon 1 kit zoom will only work the EDG LER eyepiece. I suppose the new F-mount adpater would let you use the FSA-L2 but the problem with this method is even with a DX camera you have to use ISO3200 for all but the best light so sensor noise becomes a real problem. A D3s would be the best choice for this method but then you are looking at some serious weight/money and I believe the adapter vignettes with a full frame camera.
Yes, I'm trying to find out if these would be good with the Nikon 1. It has a 2.7 multiplier factor compared to FX and of course no mirror = no mirror bounce and these scopes have built in VR, so it seems like a good combination on paper.