Eight years after redefining the mobile computing experience with multitouch, Apple is laying the groundwork for yet another revolution with Force Touch and deep investments in biometric authentication technology that could make future iPhones even more secure and easier to use.

On this day in 2007, the world unwittinglyÂ witnessed the turn of a technological epoch when the first shipments of iPhones began landing in consumers' hands. They brought with them the then-revolutionary multitouch display and a new interaction model that — Â because it's been imitated in everything from television remotes to soda machines — has made swiping and pinching feel as natural as clicking a mouse.

The inexorable march of technology forces every revolutionary idea into ordinariness eventually, and multitouch is no exception. Apple knows this, of course, and has been preparing for its next act with Force Touch and Touch ID.

Force Touch, which first appeared on the Apple Watch, gives user interfaces a new dimension: depth.

Designers have been emulating depth for years in an effort to afford users more navigational context. This is why iOS apps have zoomed in and out since the first generation; it's why iOS 7 brought translucency to Notification Center. Depth gives users a sense of order and helps prevent them from getting lost.

With Force Touch, we can use depth as more than just a visual constructÂ — Â we can use it as a method of control.

As AppleInsider first reported in February, the next-generation "iPhone 6s" is expected to be the second of Apple's touchscreen device lineup to get Force Touch. Looking further into the future, iPhones could even lose the home button. These developments are not unrelated.

With Force Touch, the home button can be made redundant. A light press on the display could be a tap, a firmer press might bring up the app switcher, and a hard press could take you home.

This requires us users to be as deft with Force Touch as we are with clicking a button, though, and we aren't there yet — Â but Apple is pushing us in that direction. Encouraging developers to make use of variable-pressure Force Touch gestures on the Mac and the already widespread application of Force Touch on the Apple Watch are moves clearly designed to get us up to speed.

What about Touch ID, though? It's a lynchpin of Apple's current approach to security, and at least for the moment it lives and dies with the home button.

Apple has been trying to solve this problem for a very long time, and there are signs that they may be getting close. Aside from the company's numerous patents on the subject and reports that a new display with integrated fingerprint recognition is on the way, relatively few of AuthenTec's experienced engineers have left after Apple's $356 million buyout. With no more laptop swipe sensors to sell, they must be working on something.

Apple has also been busy stockpiling intellectual property, most recently quietly acquiring dozens of patents from touchscreen authentication firm Privaris.