When asked if Messenger might then fall behind as products like Amazon's Echo voice controller gain popularity, Marcus conceded, "maybe".
But alongside the chic new Google Home voice controller and Google Wifi routers, it starts to make sense.
My vote has always been for a combination touch and voice controller that's bundled with hardware.
These include Quantum Break, a title that will also have a tie-in with an Xbox TV show, the open-world shooter "Sunset Overdrive" and "Ryse: Son of Rome," a first-person sword fighting game — originally made as a Kinect title, now with a combination of controller and voice control.
It may be a special sort of input – a controller operated with the chin, an eye movement reader, a voice control – it may be a combination of those.
Voice control and cross-service search means you can press the mic button on your controller and use voice queries to find content across Google Play Movies, Hulu, YouTube, Plex and more, you can search once and find anywhere – even in your existing media library via Plex, which is again not something you'll find with Apple TV.
Voice control has also been added to bring up menus, but the novelty soon wears off and the controller is simply more intuitive.
Amazon revealed that it has already invested an undisclosed sum into seven companies, which between them are making a cooking app, a fitness gadget, a connected toy, a home monitoring system, a garage door controller and a voice-controlled car assistant, all powered by Alexa.
In a fast rat-tat-tat of voices, the controllers order pilots to make heading changes and speed reductions, making holes for intersecting layers of arriving and departing planes.
I push the four thrust levers forward for an experience that repetition hasn't dulled: the unfurling carpet of guiding lights that say here, the voice of the controller that says now; the sense, in the first seconds after the engines reach their assigned takeoff power, that this is only a curious kind of driving down an equally curious road.
And if not voice, an Xbox controller.
