Google wants to take over your wallpaper, just like everything else on your phone

At Google's headquarters, there must be a room full of people trying to figure out which aspect of the Android phone the company still doesn't have its paws on. Right now, on my phone I have the following Google apps installed: Google, Gmail, Maps, YouTube, Drive, Play, Play Music, Play Movies & TV, Hangouts, Photos, Google+, Play Newsstand, Play Games, Docs, Authenticator, Google Now Launcher, Google Cast, Calendar, Keep, Slides, Earth, Cardboard Camera, Arts & Culture, Allo, Goggles an