Wait, better battery life is a progression.....
3D Touch is a brand new feature. I get not seeing the utility in your own life just yet, but give me a break. It's a completely new way to interact with your device.
It's just a different way to accomplish and perform the same thing. You can wash your car for 5 years with a rag until someone gives you a sponge. It's a new way to wash your car, but your still just washing your car, the end result is the same. Two roads to get to the same place.
Maybe app developers will implement it differently, but from the Demo from the keynote, not that big a deal and not something I can't live without.