[silvajoao]

On the other hand, Apple didn't have a cash-cow before the iPod, if you regard it as their first cash-cow after Jobs' return.

And going from there to iTunes, to merging the iPod and mobile phone everyone carries around, to arriving at the iPhone and iOS, and then to expand the screen size to build the iPad doesn't represent huge deviations from their core business.

Ping might fit within what the OP describes though.