There are plenty of very smart people at Google, but sometimes it's easier to just buy smart things that other smart people are doing. Especially when you've got more money than Jesus Christ and Michael Jackson combined. The Google Way.
Everybody freaked out when Google bought Motorola Mobility for £8 bil, because they though that was the end of Android's openness, and Motorola would get the love of the favorite child. Google's Chairman just put the official kibosh on that.