Wired magazine has a great article on 3D Touch.
Excerpts
“Now,” he says, “you can push things back. You can’t push a window back today. Now, all of a sudden, the street that used to be one way is now two way. Things will change.”
Smule CEO Jeff Smith says this changes everything. “What’s happened with this new technology is we’ve moved from the harpsichord to the Steinway.” Before, the only way to change the tone and feel of a piece of music was to play a note longer—now you can play it louder. Or softer.
Apple’s data is rich enough that Magic Piano can measure the force from multiple fingers in real time, so you can pick out a single note in a chord to play a little more strongly (that’s called “voicing”). Pressure touch has single-handedly turned the iPhone and iPad into “an instrument that can now be expressive in terms of dynamic—loud, soft, but also articulation,” Smith says. “How notes are connected. For the first time, now, you can actually be quite expressive on the iPad and the iPhone, as you might be on a Steinway.”
It’s been a while since I’ve talked to developers so excited about the possibilities of a new feature, simultaneously trying to integrate it and wrap their head around how big the possibilities actually are.
3D Touch is going to make using your phone—with your finger, with a stylus, with the tip of your nose—more natural, more obvious. It will let you do things you’ve never been able to do before, and it’ll let you do things in a way that actually makes sense. You’ll swipe to move something, press hard to select it. You’ll stop pinching—which, if you think about it, is a non-intuitive gesture—and start moving things with a single push. But it’s going to take a while.
Just as multitouch did, this kind of technology will be everywhere, fast. Everyone will have their own branding just as ridiculous as 3D Touch. But together, they’ll reinvent the way we use our phones.
http://www.wired.com/2015/10/3d-touch-pressure-sensitive-display/