Soon, it may be conceivable that your cellphone could become infected by a virus that is able to propagate using BlueTooth, or other wireless means, to nearby hosts. 

A biological virus researcher from Imperial College London, and a security researcher from BT research lab have been working on making a working model of a possible malware outbreak that could spread over phones. "The model is actually very similar to something like influenza," one of the researcher dudes said.

Who knows what may happen in the future? Perhaps if your phone has this new variety of virus, you could be barred from entering a government building or workplace. Perhaps your phone could even be quarantined by a new 'cyber-security' branch of FEMA. Certainly, phones would make a for a excellent malware host, as they contain a wealth of personal information.  Virii that could record your conversations and then email them covertly to shady people is also a realistic concept to entertain.