To stop embedded youtube videos displaying loads of completely unrelated videos to a viewer after they have watched your video change the url from http://www.youtube.com/v/ai8oNbuMSdo to http://www.youtube.com/v/ai8oNbuMSdo?rel=0. Adding the rel=0 will stop the related videos displaying.
Facial recognition app on your smart phone that scans actors faces and finds their page on IMDB, lists their films, etc.
Programmable keyboard shortcuts to paste lines of text. Now, that would be useful.
Facial recognition on facebook
Bump into an old friend, get chatting but have to rush off. Facebook me, they say. Wait, you say, I’ll take a photo of you with my smart phone and then click the ‘Find’ button on this new Facefind app I just downloaded. Facefind would use facial recognition software to match the photo you just took to photos on Facebook and suggest the person as a friend. You can then click the ‘Ask to be friends’ button.
Tesco new Augmented Reality is pretty damn cool.