I'm a big fan of mobile technology and get really peeked out about augmented reality. If you don't know what AR is, basically it's a way to use your smartphone to view content over real locations.
For example, with some apps, you can hold up your phone and it'll show you where people are tweeting from at a conference or show you where some Italian restaurants are. It's a way for brands to deliver marketing content in real-time in a very Star Trek kind of way.
The Next Web has a piece about Guinness launching an AR game in coordination with Blippar. Considering I'm a fan of beer and Guinness and AR, this resonated with me. Very cool idea that I'm eager to try.