I've seen people say 'I'd take an inch thick phone if it gave me a week of battery'.
But would you? For one thing, imagine how heavy that would be. Having to take a phone which weighs about a kilo and won't fit comfortably in any pockets, weighing down your clothes and sticking out. And how hard is it to just plug your phone in when you go to sleep, or with the fast charging capabilities we have, when you have lunch, or other times when you might not be using a phone, providing you don't forget? I can understand a bit of heft to get you through a full day on any occasion, or to get you through a few hours without charging it, but an inch thick phone for a week? Sorry, I'm not getting it.
I think advancements in batteries won't lie in getting you through long periods of time, but in better fast charging capabilities. If my phone could charge in 10 minutes, which at the rate we're going at today, could happen within the next few years, then I would take 2 hours SOT. Not joking. Fast charging today is a bit overblown. Sure, it has improved, but waiting 90 minutes without using your phone while waiting for it to charge completely is a bit unrealistic for ideal use cases. I find that currently, the first 50% charges about as quickly as the last 10%. If they can get a consistent rate of charging throughout the whole process, that would be a huge step forward.
An inch? I don't think anyone wants an inch.
In the case of the s7, we're talking about a 1.1 millimeter of increase in thickness. That is not unreasonable considering it means you get a 3000 mah battery (up from the s6's 2550, I believe). Not to mention waterproofing, micro sd, and the potential force sensitive screen. These are worthy gains for a mere 1.1 millimeter.
As for fast charging, I agree -- I can't wait for the day fast charging is so quick you can just knock out a full charge within 10 mins. We're heading that way it would seem.
However, I don't think the current state of fast charging is "overblown" either. It's best use is not in waiting for it to charge to full in 90 mins (which is still better than devices without fast charging that takes hours), but the strength lies in juicing up a bit in a very short period of time so you can gain enough battery to go the extra mile with your phone.
I'm talking about fast charging for a good 10-15 minutes to give you maybe 40% or so more battery life. This has saved me a few times and is an incredibly helpful feature.
I would not accept a 2 hour SOT even if it meant 10 mins to full charge. What if you can't get to a plug? 2 hours SOT these days is measly.
No one wants a brick phone for sure. But in this case, the weight gain and thickness gain looks like it'll be negligible, but the features gained can be monumental for the s7.
Others may feel differently but I think samsing is making the right calls for the s7's size so far. Don't forget it's also a hair shorter and narrower. It'll make one handed use easier. The slight gain in thickness could actually aid ergonomic and grip-ability.