Given that I said it's also a gaming device for me, that's one way where 'more' is roughly equivalent to 'better'. And actually, per clock, we're using less power. The new Apple processors are a lot more efficient than the old ones.
The camera in this phone isn't just 'marginally' better, it's a lot better. Better optics, faster focusing.
Browsing the web is faster, which is meaningful because of how bloated and bad the web has gotten.
I can use TouchID, which doesn't sound like a big advance, but it really saves me a lot of time and gives me a measurable amount of additional security. I've upgraded from a 4 or 6 digit passcode to something that's more than 15 characters long, and I don't have to type it in every single time I want to do something on the phone. My thumbprint is theoretically something someone could duplicate, but when you look at the people that have 'hacked' the phone that way, it's incredibly time and resource intensive. If someone wants my phone that bad, there's nothing I could've done to stop them anyway. They certainly would've cracked any passcode I had.
But basically, arguing against the progress in phones as good or useful or noteworthy is just shouting at clouds. The phones are better the way our PCs are better. Does that mean we should upgrade every year? Or even every two? Probably not--this world has enough waste as it is. But I do do 'more' on my phone than I ever have before. It's the central piece of technology in my life, and I perform more tasks on it than I used to. I don't use my desktop computer as much because I can lean on my phone more heavily. How is that not 'more'?