Wireless internet connectivity could give transit a major boost over driving (surfing and driving don't mix). Especially on transit systems geared to the upper middle classes like commuter rail. Wifi on bus might not have the same appeal.
Of course other cities have had this for years in Japan, and this improves upon contact-based systems like Octopus in Hong Kong, Oyster in London, by using cell phones. Unfortunately there are no standards for using cell phones for contactless payment in the US, so while it is technologically feasible, it might not be adopted due to a lack of standardization.