LAS VEGAS — Whirlpool is showing off an interactive cooktop concept at 2014 International CES that not only turns a typical kitchen surface into a stovetop, but also a place to check the weather, find recipes on Pinterest, research cooking tips and post pictures to Facebook. Although the concept isn't a reality just yet, Whirlpool is calling it the "kitchen of 2020," which could integrate hands-free devices and touchscreens into the kitchen itself.