I have always thought in a way of making tourism easier and better. Imagine you are in a hotel and you want to see what attraction are near, or you want to see which store is near that satisfies your needs or what restaurant. It acts like a gps, it takes your position and does a search of the things that are near, the time of waiting. This way you can optimize time and plan better.
This idea could also have comments and be completed with other peoples coments.