When Apple replaced Google Maps in iOS 6 with its own software last year, one of the biggest user complaints was that the new app didn't have public transit data. For folks who take the bus or train to work everyday, it was a big deal.
The good news, though, is that the company does appear to be working on adding the feature. In addition to acquiring transit experts like HopStop and Embark, Apple has been hiring software engineers for its 'Transit Routing' team.