Having created a supercomputer that beats "Jeopardy!" champions, IBM is now developing "Watson"...

Having created a supercomputer that beats "Jeopardy!" champions, IBM is now developing "Watson" for commercial applications, which the company believes could generate billions. Watson is already crunching data for Citigroup and WellPoint; ultimately, a Watson app for a smartphone would be able to answer consumer questions, such as about their health.