I work with "smart" phones (I call them 'stupi-phones') on a regular basis, and have had the opportunity to test drive many new phones before they're announced. There's nothing to make you want your FULLY PAID phone than having 2-or-3 supposed "iPhone killer" devices at your disposal. Bigger screens have battery trade offs. Faster processors can have the perception of slower performance depending on the network bandwidth in your area.
In the end, when I have 2-or-3 devices, I download the latest & greatest apps to all of them, and switch back and forth between them like a kid in a candy store. Was even given a Samsung smart-watch for FREE (it went on eBay). In the end, I always came back to the device I OWNED OUTRIGHT, and it works very well thank-you-very-much. I've replaced batteries, and screens, but at this point I won't bother with those teeny tiny screws. Now I pay some guy $50 to do repairs at a local repair shop.
If you buy the top-of-the-line iPhone even in 3 months (6s perhaps - if you read the gossip columns), you'll be paying around $800 over 24 months for a device that you won't "own" for 2 years. And during that 2 years, there will be two (2x) more iPhone releases - something like the iPhone 7, and you'll pay off your iPhone 6s just in time for the iPhone 7s.
But it won't bring greater joy into your life.
Yeah, I've been trying to decide whether it will make me happier. Which is kinda silly because it's just a tool.
Oh, I'm not concerned about the new-gen iPhone being released, I'm planning on going to Android. A 64GB iPhone 6 is now $1149AUD (or about $85AUD a month on contract), and honestly I reckon that's too expensive (plus iOS/iTunes is beginning to shit me). I can buy a last-gen Android flagship for under half that, and it's probably 99% as good. I've seen the LG G3 for a pretty reasonable price (~$450AUD outright or $60AUD a month on contract).
Part of it is that I've also got an iPad 3 that's starting to feel a bit heavy and slow. I was eyeing a new iPad Air 2, but then thought, why not get a bigger phone and replace both devices?
I should really hang onto the old devices until one or the other breaks, but there's that pull of a fancy new all in one device. Yet I know that if I buy the new phone, in three months hedonic adaptation will set in.
Stupid consumer weaknesses. :)
What would a Mustachian do? :)
Depends on what that Mustachian valued.
This is true. I find it's worth using decent quality tech devices, but I'm not going to go crazy and buy a new phone every six months.
Of course, if I buy a new device, then I've got to get around to selling/giving away the old device, and that just makes it more of a pain in the arse.