Just imagine when your mobile has near field and you can do this with museum exhibits, places, concerts.

This was done by Coca Cola with specific RFID wristbands and readers, but it can’t be too long before Facebook is omnipresent. Now that is a real challenge to Google.

Coca Cola's real life Like button

Obligatory sun-kissed teenagers in the video that describes it. Because it wouldn’t be pensioners, would it.