Carl Howe made a good point yesterday that this can be viewed as an extension of the company's mission statement. I also love the idea of Jim Collins' BHAG (Big, Hairy Audacious Goal) and consider myself a fan of his work. However, these forays are clearly outside of the company's core competencies of search and advertising.
I'm also a big fan of another business guru, Warren Buffett, who has famously discussed the idea of “circle of competence,” the concepts, industries and business plans which an investor can easily understand and evaluate. Those that lay outside an investor's circle are obviously beyond her ability to effectively analyze and hence dangerous to her financial well-being.