Not a lot of known about what is expected to be branded as Android 6.0 but we do know it will come with a new Voice Access feature.
Yet another session mentions something called "Voice Access" and suggests Google wants to let users control every feature of Android apps (and the device they're running on using only their voice. This would expand beyond the "OK Google" commands that are possible now. Google describes Voice Access as such:
Mobile hardware has adopted the touch screen as the primary mode of input. And with 1 billion active Android users, there’s no sign of this slowing down. What if you could provide users with a new method of access to your apps with little to no development overhead? In this talk, we introduce Voice Access, a service that gives anyone access to their Android device through voice alone. We will focus on simple steps developers can follow to ensure that Voice Access provides an optimal experience within their apps.