Will Robots Make House Calls?

Not quite, but smart technology will revolutionize health care

July 1, 2030. Like just about everyone she knows, Angela Jefferson, 36, wakes up to the insistent patter of a HealthWatch Model 9000 alarm clock. "Today is Monday, and the time is 6 a.m.," the little box chirps. Angela stares at its smooth, blue face long enough for the embedded microlaser to scan the back of her eye. "Ocular pressure, blood pressure and carbon-dioxide levels normal," the alarm clock reports. "But you are dehydrated. I'll signal the refrigerator to fix you an electrolyte cocktail."

Angela pads off to the kitchen to pick up her drink, then heads to the bathroom. Before...

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