There are a lot of things that are questionable in that article. Smaller size for a higher capacity battery? Good if they can pull that off, but I doubt it, batteries do not miniaturise well.
And what storage device do you use for 8K without compressing the image too much?
And finally, who is going to be able to post the material at 8K?
actually, at the rate my eyesight is deteriorating the advances in resolution just about keep my eyesight on par. however, there's less and less i actually want to watch on tv nowadays....
Wait a second... 8k is 7680x4320, which is 33 megapixels per frame. 4k is "only" 8.3 megapixels. I find it very difficult to believe that GoPro has figured out how to record an 8k-30p image, much less in a package half the weight and size of a Hero4.
8K is doable. The Lumia 1024 had a 41MP chip in a phone years ago. My guess it is just that technology coming down the pipe with video. Think about how small that chip package is to fit in a phone 1/2" thick, plus screen and battery.
It isn't the 8k sensor that's the technological stumbling block, 8k video at 30 frames per second (7680x4320 pixels x 3 bytes per pixel x 30 frames per second) requires processing and compressing 3 gigabytes of information per second and storing it on a memory card. This currently would require far more horsepower than would fit in a reasonably priced, GoPro size camera much less one half that size.