There are a few problems. The Sony take is limited because 4k whilst it's good..is nothing more than a stop gap, until 8k turns up (and that's not a joke it's out already)
8mp is obviously though acceptable for stills where as normal full HD isn't really cutting it. But why have 8mp when you can have so many more with 8k? (
)
The other angle Sony are working on (as the video shows) is trying to push the "open" nature of the mount. Oh you can use your Canikon glass on the bodies you don't have to re-buy an entire system. But there are problems, limitations for non native or non A Mount lenses (AF being one, aperture control another depending on the adaptor)
Even with A mount lenses you have to get the more expensive SLT style adaptor to have AF across all the lenses (even screw drive ones)
It's not quite the wonderful solution that Sony are making it out to be. I know the game they are playing, they would surely love heavily invested Canikon users to hit them in droves, but I think users will be very naive to think Canikon will "sit back and do nothing"
You could argue Sony are being aggressive and disruptive and maybe even clever. But it remains to be seen how that pans out (I'm not convinced they are capable of looking after their customers long term and that bothers many)
There are plenty of worried A mount users on DPR forums to think Sony have done some serious damage to their own native mount
Onto the grab stills from video. The idea sounds great, but do you really want to have "fire and forget photography"?
I'm pretty sure I don't, how much do you need before you don't have to do anything at all? How many hours looking through video footage to find that perfect frame, watching tiny minor differences, maybe the light change ever so slightly. All those clips you'd need to keep just in case you find a better image in them?
It is not my idea of fun, nor the future of photography.
4k, 8k is a mass market consumer mad ploy to get even more sales out of tired industries (cameras, tv's, video devices, streaming media, more cinema customers, more beefy computers to deal with the high res video)
Good enough folks..that's what counts. I look at some people spending a fortune on new phones every six months, we live in a consumer mad society where what you have doesn't matter, it's what you could have that counts. You have to hand it to companies they're really done a great job of selling us the same thing over and over again, in a slightly improved form year after year