Google's next major Android hurdle
We need only to look to last year's Android 6.0 Marshmallow release to see why this challenge is so critical for Google to overcome. Take, for instance, standardized system-level support for fingerprint security -- one of Marshmallow's marquee features. Its presence in the operating system allows developers to implement fingerprint security into their apps without much work and in a way that functions seamlessly across devices.
Seven months after Marshmallow's release, though, the number of apps actually taking advantage of that function is surprisingly limited. Even Google-developed apps that'd be obvious fits for fingerprint support have yet to get on board -- like Google Wallet, which requires a PIN upon startup, and Google Authenticator, which certainly should provide a security prompt when opened.
Then there's Android 6.0's custom text selection feature, which gives developers the ability to have an action from their app appear in a menu whenever a user selects text -- alongside basic text selection commands like copy, paste, and so forth. The idea is that such a setup could let you select text and then quickly perform a specific function with it, like translating the words into another language or looking something up in Wikipedia.