Apple Pay is a great recent example of Task Unification. Apple has looked at the closed world of a person's pocket and added a payment feature to their phone thus subtracting the need for a person to carry around all of their credit/debt cards.
Yahoo Sports for iOS adds Loops for capturing clutch catches, epic fails
Tile Tracker - You’ll never stop losing your stuff but iOS-based Tile is going to make finding it easier. These matchbook-size trackers don’t just rely on Bluetooth, they connect to other Tile users to help cast a wider net in recovering your lost item.
Apple is working on a fix for iOS bug that causes tapping links to crash iPhones