It's the opposite; Google's seeing that their revenue stream is very near a monoculture and they know monocultures can't last forever. A lot of their initiatives (cloud, video, wearables) are trying hard to find an alternate revenue stream that will be as profitable as ads so that when the industry inevitably crashes (not because of anything specific they can predict, but because all industries eventually do) they're not powering their entire empire off of a single river that just dried up.