The iPhone 6+ is literally just a bigger iPhone, its Apple copying Android oem's because they couldn't ignore the demand for bigger phones anymore.
For years Apple kept repeating '3.5" is the ideal size' which then changed to 'oh no we really meant 4 is the perfect size'.
Apple copies Android - just like notifications, control center, copy paste, Siri, custom keyboards, notification widgets, typing prediction, and tons more.
It's pretty well known any new innovation takes a few years or more to show up in Apple products, but its usually polished, and its always proprietary. This is what they do.
Samsung, LG big phones all contain features designed to make your life easier. But these companies don't have Apple's marketing or rabid fans, so they are made fun of.
e.g. Samsung's gesture to reduce screen size is MUCH more useful than Apple's - I'd rather have the entire phone UI rather than shrinking it to half size. Yet most reviews tell users Apple has a great feature.
Other than landscape mode in a few apps, Apple did nothing to utilize the big screen. Of course this is part of their strategy - why add 2 features when you can stretch them out over multiple releases.
