The artificial intelligence system known as Watson is going to supercompute your health. IBM and CVS announced on Thursday that they will work together to come up with algorithms that use physiological indicators and red-flag behaviors to predict whose health is fine and whose may be on the decline. The first stage of the deal will focus on patients with chronic conditions, such as heart disease and obesity, but after that the sky's the limit. Here's why the deal is poised to shake up the way you think about health care. CVS has 7,600 retail stores, about 1,000 walk-in medical...