Jobs emphasized the focus on laptops this year. Well, who uses lap tops? Mostly business people and college students.
Boston happens to be the most densely college student populated city in the USA. A statistic showed that the average age the people of Boston was 28. Getting students (who are usually more accepting to change) to switch, especially en masse, could potentially establish a concrete consumer base. As a soon to be college student myself, I notice that a lot of my friends are investing money on lap tops, as they are anticipating the need for portability. Many of them have not considered Apple.
I know that Stanford U. unofficially endorses Apple as most of their students use them (this is by word of mouth), and having Harvard, *MIT*, Tufts, or Boston College become an Apple majority school might not be so bad for the company's rep.
Of course, this is thinking way into the future. My point still stands, however. Moving to Boston is definitely a good idea.