Phones you can smell as well as hear

As Apple made clear with the iPhone last week, touch screens are the next evolutionary step in the development of mobile handsets. But Sony Ericsson is going after another one of the human senses: smell.

The company is making a line of aroma phones for Japan's NTT DoCoMo, according to Reuters, "to relax the users while making calls." (So Japanese in so many ways.) The handsets come with your choice of nine "scented sheets" accompanied by different designs.

Why, one might ask, would anyone want a scented phone? Perhaps it has something to do with countering hygiene-challenged riders on Tokyo subways.