This is a $1,000 consumer camera. Whatever the NAB will bring, this is not likely to be its target.
For those of us who shoot stills and video, It really makes sense to see what the Nikon D500 looks like. I am shooting a lot of wildlife stills (and video) with the Sigma 150-600 Contemporary and the Canon 100-400 II right now. It isn't clear how well the A6300 will handle those big lenses, or the Canon/ Nikon 300 mm 2.8 and similar.
Here is one test by Hugh Brownstone where the 300 2.8 didn't auto focus too well. He tried 3 different adapters:
http://hughbrownstone.com/new-blog-1/2016/3/8/8zsz5npdn8ptjdp8yckce70d49saab
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I sold my Nikon D7100 to buy a Canon 7DII about 1.5 years ago. I have a full set of Canon glass taht I would keep to use on the A6300. I also have aSony A6000 kit- for stills only- with a few key Sony lenses. The Sony 18-55 kit lens, 16-70 4.0, 16 mm 2.8, 20 mm 2.8, 50 mm 1.8.
But I still have a Nikon D810 for low ISO, detailed images, for higher ISO at events, and similar. If I could swap from my $1,050 7DII and a $1,000 Sony A6300, plus get rid of the adapters, Canon lenses, and Sony lenses to get down to 1 camera systemm for wildlife stills and for 4K video .... that would be heaven! I have been shooting 3 systems for the past 7+ years (Nikon, Canon, Sony), and I have been shooting 5 systems this past year to get 4K video for events (added Panasonic G7 & GH4, and a Samsung NX500.)
The Nikon D500 is definitely going to be a killer camera on the stills side. A pro quality DX crop sports, wildlife, and events camera..... Let's see what kind of 4K video it can deliver.