The iPhone 5s brought us the Touch ID fingerprint identity scanner. Both, transformative. The same is true of 3D Touch on the iPhone 6s and iPhone 6s Plus.
3D Touch
Technologically, it makes multitouch multidimensional and take the capacitive screens we've been enjoying since the original iPhone to a whole new level. Or rather, depth. With 3D Touch, you don't just swipe and tap anymore. You press. And thanks to the Taptic engine, you
feel like you're pressing.
Functionally, it makes the iPhone faster and more convenient. Instead of tapping an icon to launch an app, you press to jump right into it.
Apple calls these Quick Actions; you can have up to four per app icon. They can be static for tasks you do all the time, like taking a selfie or getting directions home. They can also be dynamic, so you can go straight into a recent text chat. Instead of tapping back and forth to read mail or preview maps or web pages, you can press into list items or links to peek at them, lighten up to back out, or press deeper to pop right in.
Previews and actions can even be combined together: When you peek, you can swipe up to get a list of quick actions and tap on them immediately. You can even swipe sideways in Mail to quickly triage on the go.
You can press the keyboard to turn it into a trackpad, the side of the screen to switch back to previous app, a Live Photo to animate it, and the list goes on. Apple has also given developers direct access to the dynamic pressure sensitivity data, as shown off in the new Notes app. That'll be great for everything from drawing to gaming.
It does take some getting used to. The difference between a tap, long press, and 3D Touch can be tricky at first. But the haptics and interface are well tuned and once you get the hang of it, it's like you have a warp tunnel through iOS. It accelerates
everything.
Cameras
The cameras have seen substantial improvements as well: The rear iSight is now 12 megapixels with "deep trench isolation" to make...