I have a 5 year old phone and I could buy a new faster one with fancy features, but for what?
This one can do calendaring, maps, notes, todos, web browsing, apps, so there is no compelling reason to upgrade.
Maybe if they come out with a phone where the battery will last for a week or more then I'll upgrade.
If someone wants a rugged, long battery life phone (this has a 6000mAh battery) it would be a reasonable bet. No different from pre-ordering from any other hardware manufacturer.
But are right of course, even cameras won't save the two year upgrade cycle. There will be an even more improved camera next year, just hold out a bit longer. Repeat until the old phone is actually broken. Everybody wins (long term even phone mallets will need a livable planet)