NYTimes.com: Induction cooking has been around for decades, but only recently has demand driven prices down and selection up. In the last two years, Viking, GE, Samsung and Kenmore have begun selling induction ranges.With its energy efficiency, kitchen geek appeal and growing reputation for power and precision, induction cooking may be the iPad of the kitchen. Like Apple’s latest invention, induction technology could forever change everyday tasks, or it might never deliver on its promise.