Google planning " Ok Google Everywhere "

rumors and leaks have been revealing Google’s efforts to put a new face on Android, UI changes an even flatter, minimalistic look, Ok Google Everywhere and a new navigation experience.
Android Police gathered some evidence suggesting that Google wants to make its Ok Google voice command a major part of the Android experience, and rather than being locked to the home screen or Search app, voice control would extend to a wide variety of individual apps, hence, the Everywhere.

Google may also be looking to change the navigation buttons we’re currently familiar with, with the biggest shift being replacing the home button with a Google button – one that would act as a persistent shortcut to search. To get back home, you’d instead have to hit the recent apps button ,which itself would get a makeover, and perform a swipe gesture.