One interesting thing he brought up is that as a developer, you can't develop as if everyone is using a 3D Touch device, because they aren't so you just add some enhancements to your product for the 6S(+) users.<p>This means among other things, it will be easier for Apple to abandon the idea if it ends up not being worth it, since it is such a small part of the UX of the devices, or even replace it with some other mode of interaction.