"Patents filed in the US show that TiVo plans to take personalised television even further. The company is working on a PVR that will recognise one of several individual users, and respond to their personal preferences. Every member of a family could have a personal radio frequency tag – embedded in clothing or a piece of jewellery, for example – and the PVR's remote control would recognise the closest tag. It would then send a corresponding ID signal to the recorder which would use the personal preferences it has built up for the tag-wearer only." (New Scientist)
This, of course, contains a promise of taking ad targeting to an entirely different level and perhaps will put an end to showing tampon ads to the family guys out there.