Would you consider facebook's move to the news feed a "pivot"? They certainly changed the fundamental way you interact with the product and shifted its purpose (a directory of your friends vs. updates about what they are doing) Most tech businesses that has survived, one could make the argument, have "pivoted". No matter what you call it, it's just good business.
A lot of people are calling the Stickybits move to turntable a "pivot" - but wasn't their purpose this entire time to create a new way for people to interact with media? Different interface, same purpose.
Make stuff people want, right?