I wouldn't be too worried about Bigsby tbh. It's going to be first gen offering, so it will have numerous flaws. We can't expect Samsung to do well in the software department because they architected S-Voice. Samsung Pay was hacked before as well. Touchwiz is still having the sweep under the rug effect MRU described before. It's ironic how Tizen is doing in terms of resource efficiency vs our TW Android stock ROMs. If Samsung built TW from the ground up again between the S7 release and now, imagine how good it can be? People are saying TW Nougat is good right now, but imagine if they made it even more leaner than we can reasonably anticipate?
Idk if the battery will be smaller because they might need bigger ones for a 6.2" display (that seems to be the Plus model.) There isn't going to be a flat design anymore because the Note 7 released with dual edge screens with better ergonomics.
It's hard to improve such a tremendous camera as it is, but it will be better, but it depends how much you value smartphone photography and video capture.
RAM, sadly will be 4GB for the entry level, which makes me sad because I wanted 6GB for the TW rug sweeping. The OP3's 6GB makes app refreshing a lot more smoother post-update. Similar design, yep. But it will less bezel, include that rear FP scanner/front facing Iris scanner. New Exynos chip isn't going to make your phone obsolete.
Don't forget that your screen won't be the best in class anymore since Samsung will put an HDR QHD screen out at the very least. I am not too sure about any hidden features that we might not expect here.
The difference between the S6 and S7 was more of a polish than a S5 to S6 jump: IP67 rating, 1GB of RAM more, return to Snapdragon/Exynos splits based off region, dual edged screens on a bigger model, cleaner software with minimized color choices, better screen, slightly slimmer profile, better battery, Always on Display, etc.
If cost is a major factor, then the S7 Edge is a better get. Let me break it down on how it would work for me then let us know if I was close to what you were experiencing? So say if I spent $450 USD on a refurbished S7 Edge or $550 for a new S7 Edge? The S7 Edge prices were about $780 at release. So let's say it increases to $850 because of more memory (64gb/6gb RAM) along with a bigger screen? Is that $300 USD + taxes going to be worth the additional 2GB of RAM, better camera, slightly improved Nougat Grace UX rom, Iris Scanner, bigger screen with HDR, less bezels, rear FP scanner that's probably likely to be always on like, expanded privacy features, USB Type C connector, Bigsby, and a desktop mode?
Chances are probably not because let's face it, the latest and greatest has piqued into jazzing up stuff and it not making a huge difference. $300 extra could mean more renovations to a house, a nice gift for a family member, a small vacation within your geographical area, paying some additional bills faster, investing into a few shares of stock or in safer money market accounts, etc. Hope you enjoy your new purchase!
Thanks, yeah cost is a major factor in a sense that i feel the cost for flagships are really starting to spiral out of control and we're not far off from 1k+ being the norm for the highest config. With Apple rumoured to be releasing upgrades to the 7 and 7 plus along side the OLED 8 that reality could be sooner rather than later.
My limit is £700 which i'll admit is already about £200 too high but in this case, for just under that, i got a phone with 128GB on board storage + a MicroSD slot. Unlike the US and other markets, over here its incredibly rare to find a phone thats at least 5.5" and has 64GB storage + the card slot so i jumped on this. On each of my last phones including my 64GB iPhone 6 Plus, storage is always the first and typically only wall i hit so i wanted to make sure i get something that can take me as far as possible in that regard.
The One Plus 3T gives the best value for money but outside of that and the ZTE Axon 7, This was next in line. Other than design, display, storage and camera , the after sales support was what made go for this. As you mentioned, there doesn't seem to be anything on the S8 that i could justify spending more on over the S7 edge. Outside of design which if recent leaks are to go by, i prefer on the S7, the SOC is most likely the only noteworthy upgrade which is unlikely to be evident until a few years from now.