Looks interesting. I'm gonna hold out and see if they do the trade in program for $100 off like they've done in all the last couple releases. I got a pile of old broken GoPros sitting around.
GP+ sub is $50 so basically it's $50 off unless you are really stoked on their service. No questions asked camera replacement is sweet, I would worry less about breaking it and probably take more risks with mounting, but I have plenty of older GoPros to do that with. Rest of the sub doesn't excite me. Not sure I wanna store my video files on the cloud, uploading a 64GB card would blow away my monthly data allotment from my ISP. I easily can burn 500G data a month with GoPro footage. Hard drives are cheap, data overages are not plus its slow to upload.
Biggest win for me is the larger sensor and bigger battery. Winter is hard on GP8 batteries, I generally carry at least four to film a decent sledding day. I hate when I go to fire a shot and the battery is dead or close and I have to quickly try to swap battery and loose the shot. Worse swapping batteries in a snowstorm. Not excited about it getting bigger, but I get it with battery and sensor. I do a lot of filming outside of sledding and the front screen for vlogging is nice, been thinking about getting a mic so it would tie in nicely. I've been trying to put a more personal spin on my videos with talking heads so that's a nice feature.
Last of all is Hypersmooth 3.0.. 2.0 was a big jump and its nothing short of amazing for me after years of using gimbals. I love not having to bring a extra piece of equipment and the time it takes to setup a gimbal not to mention most aren't waterproof or are very expensive when you add in waterproofing. Biggest drawback of Hypersmooth was the crop which really is evident when filming mountain biking. I actually started turning off hypersmooth this summer to capture the cool arms and bars look. With that new wide angle lens it looks like it'll cure that problem. But, do I want to be changing out lens in a snow storm? Probably not so that locks me into the fishbowl fisheye view. I switch the camera views a lot during the day from Superview on 1st person to Linear if I'm catching a shot of someone carving a pow line by me. It's not clear to me how that lens will effect settings like Linear.
So yeah, someone go buy one, record straight for a couple hours in below 25 degree weather and share some of the Hypersmooth footage! I'm sure I'll buy one by November though so ask me then.