From TechCrunch's excellent article about Google X:

No idea should be incremental. This sounds terribly clichéd, DeVaul admits; the Silicon Valley refrain of "taking huge risks" is getting hackneyed and hollow. But the rejection of incrementalism, he says, is not because he and his colleagues believe it's pointless for ideological reasons. They believe it for practical reasons. "It's so hard to do almost anything in this world," he says. "Getting out of bed in the morning can be hard for me. But attacking a problem that is twice as big or 10 times as big is not twice or 10 times as hard."