Upload & Sell: On
No if Sony comes out with a new 500mm or 600mm lens to match up with the A9's specs then I think Canon and Nikon are in big trouble.
I wonder. Specs are all well and good, but what matters is practical use for the professional action shooters Sony hopes to target. For serious work at high speed, this camera will require use of the battery grip, so it won't end up being that much more compact than a 1DX II, and of course, lens size and weight will be similar. The smaller body may even be a detriment compared to the proven shooting ergonomics of the big Canon and Nikon cameras.
20 fps vs. 12 or 14 fps? Well, assuming the camera can track focus at that framerate, that could be a benefit in a few specialized applications. But I'm quite comfortable shooting sports at 10fps and rarely miss anything due to framerate (most misses are my own making). I'm not sure that framerate alone is worth switching entire systems over.
No viewfinder blackout? That could be cool. Except that EVFs are never real time, no matter how good, and still have other compromises. Maybe Sony has gotten close enough for the hobbyist, but I wonder if that will be true for the professionals who depend on these systems every day.
Don't get me wrong--I like this camera, particularly the improved ergonomics, which finally are approaching DSLR territory. The compact size, sweet spot image resolution, the improved control layout, IBIS, EVF performance, all would have made this camera an exceptional "all rounder" at a different price point for anyone who shoots in a photojournalistic style. It doesn't need 20 fps for that.
But as a 1DX 2 / D5 killer? Not so sure, even with the right lenses.
Also, getting a bit jaded by the whole "DSLRs are dinosaurs" hype that seems to have settled everywhere. There are shooting situations where optical viewfinders are simply superior. For professionals and enthusiasts, DSLRs can live side by side with mirrorless.
It's like the photographic community is reliving the whole "post PC era" nonsense where iPads were going to replace all of our desktops and laptops. The PC didn't die, and neither will the DSLR, at least in the specialist ILC market that's left in the wake of smartphones.