Google Maps has introduced new feature Indoors as logical next step. The videos bellow illustrate the applicability of this feature in airports or malls, and I really like the message that all the previous maps have left you at an entrance door. This app among everything else, for me as a virtual tourist, brings a joy of getting inside of many places like NYC High Line or Colosseum in Rome (that is just is presented in the advert video...who knows what else is there :). Bliss.
Google Maps Indoors / Airports
Google Maps Indoors / Ikea