I'm not that impressed. Flat protune doesn't look bad colour wise compared to previous versions which were totally washed out (it is made for grading so we can't really complain, it's Pro for a reason). However, I noticed in the garden, the highlights on the picnic table were blown out. In hyper mode, running around the table, there were several places I noticed artefacts around the edge of the table - GoPro or YT?
Overall, nothing in the picture I've seen blows me away from a positive perspective or makes me think it's any better than the competition / Hero 6 by any worthwhile amount.
Although I wasn't sure at the time, the Fusion still appears a good direction for them to be going in but what's needed in my opinion, is more resolution as the pixels are spread over a large area which reduces density and quality of video + a better lens for less distortion (although it's surprisingly good for the angles involved). But the biggest issues is price. Yi and others have the PQ quality close on the regular cams for a 3rd the price and GoPro have had quality issues with the hardware in the past - my own Hero 2 went back for an exchange after only a year. In the past there have been reports of lockups and overheating of some cameras. High price, not enough PQ difference and some questions on reliability, don't make for high sales in my opinion. I've owned a GoPro but for the price, I'd probably buy a Yi 4K+ or another similar camera instead of GoPro were I in the market. If GoPro want me to GoPro they'd need something that returns groundbreaking PQ that others can't match.