I can easily live (and work) through a day without touching anything of Microsoft. In fact, I do so for a few years now. But there’s no way I can say the same about Google. It all started with a better search engine (I used to use Yahoo and Altavista back in the days). Then it grew to some ads for my website, my email, my calendaring, log analysis for my websites, chat, and so on and so forth.
And something tells me that I am not alone.