Never forget a birthday with Google Glass

Google Calendar currently has a separate calendar in which birthdays of Google Contacts are automatically listed, complemented with Google+ contacts. So when you add a contact to your Google+ Circles, his / her birthday will also immediately be added the calendar.
Google Glass will keep you informed on the number of days until the birthday and you have the possibility to schedule the congratulations in the form of a message on the date itself. You can immediately schedule a visit in your planner, you can you take a look at the (possibly) shared wish list of the birthday boy/girl so you always buy the right gift. You will probably receive a suggestion for a gift through Google AdWords which can be purchased online immediately and be delivered at any point needed or desired.

This feature is already present to a certain extent in Google Now.