Motivation:

It is Friday Morning. Alla rushes to the Cancun airport in order not to miss the flight to home Chicago. When she gets there she realizes all flights are delayed, and she has more than 2 hours to burn at the gate.

The feature:

Alla quickly reaches for her credit card. She uses it to activate one of the many movie-on-demand public stations located at the gate. She then downloads the movie of her choice. The 2 hour waiting time all of a sudden turns into an unexpected joy...

How this can be accomplished:

Figure 1 below illustrates how this can be accomplished.