My feeling is that Nikon is coming to the mirrorless game so late that they really would have to have a stunning product that would capture people's attention and immediately be even more functional and useful for a number of photographers in order to instigate a switch on the part of many users from Sony (which at the moment seems to be ruling the roost in the mirrorless category). I myself am on the fence at the moment about where I want to go with future camera gear purchases. I've had a Sony NEX-7 for a number of years now and I've loved it, and I've also had the Sony RX100 M III and now have the RX100 M V and MVI. All are pretty cool, sophisticated cameras. In the beginning Sony didn't have many lenses to offer in the E-mount category, but now they've got quite a few, plus they have gone on from APS-C to offering full-frame FE-mount cameras. At the moment, I'm leaning very much in the direction of picking up a Sony A7 III and a couple of lenses, but the camera body and certain lenses have proven to be so popular that they're actually hard to get one's hands on. This is a situation where I would most definitely want to actually handle the camera prior to making a purchase, so unlike the RX 100 M VI, which I felt comfortable preordering from B&H because of familiarity with the RX100 line already, I am waiting until the time I can have a hands-on experience with the A7 III and lenses. In the meantime now there is the tantalizing news about Nikon's venture into mirrorless, with hints that we'll be hearing about the release of the two bodies and a few lenses soon.....
I have used Nikon since the late 1980s if I recall correctly; prior to that I'd used other brands of SLRs but Nikon was for me, the brand to strive for, the one to get when I felt I was a good enough photographer to really be able to utilize whichever camera I chose. I brought home that Nikon N90 with a sense of wonder..... Years later, after sticking my toes into the water of digital photography with a series of Coolpixes, one day I knew it was time to get a DSLR, and of course that DSLR was going to be a Nikon. It just felt right in my hands, felt very comfortable and familiar while at the same time was also a bit strange-looking with that LCD screen on the back....LOL!! The D70 and I hit it off immediately. A few years and a couple of other Nikon DSLRs later when I felt I was ready to "graduate" to the D3, I stood in the store feeling much the same as I had that day back when I got my very first Nikon SLR.....
It's going to be really interesting to see what Nikon has to offer us with its new mirrorless cameras and accompanying lenses, plus what they provide as an adapter for those of us who have Nikon F-mount lenses that we've loved and used for (in some cases) many years. I'm looking forward to the big reveal, but at the same time I'm being realistic enough to know that whatever Nikon is offering may not suit my needs for one reason or another and that I do already have my very positive experiences with Sony over the last little while which more than likely may be convincing enough to find me in a store one day having hands-on getting-to-know-you with the A7 III and bringing one home.....