We must ask ourselves whether increased public safety and convenience will come at the cost of our privacy, and whether or not this is a price we air willing to pay.
Your colleagues will know you have arrived and your computer will recognise your voice and automatically log you on.
Some car rental companies are alredy using this technology in order to know where their vehicles are bring driven at any time.
Using special floor tiles, computer are able to identify people from the way they walk.
In some buildings there are even cameras in smoke detectors, clocks and exit signs.