It is interesting thought experiment to be low level in data centers discussing sites, power, cooling, etc, then sometimes pop your head up and get a big picture view what you can see.
I was chatting with a Google person last week and I was thanking him for a response to an e-mail I sent a year ago to check on their data center calculations on their web site. Thanks X number of data centers is what you have and Y number of data centers will come on line within the next 12 months. He was surprised I knew. I told him I can count the number of announcements made over the past year. It's easy to see when you know where to look.
When I was at another data center conference someone asked me what is Google going to do with all that capacity. I don't know.
Then I saw the below graphic when I was playing around with some ideas of a Triumvirate.
And, then it is was simple to say. Google is focused in order of priority - web, images, maps, shopping, videos, news, books, blogs, flights, discussions, recipes, applications, and patents.
I have a friend who is starting a company about recipes with plenty of funding. Seeing the fact that Google is looking at recipes may mean a potential business model for her is be like Waze have a huge following and sell your company for cash to Google. :-)