The much-hyped ecobee Switch+ smart light switch will be landing in stores on March 26, ecobee President and CEO Stuart Lombard announced at the South by Southwest conference in Austin, Texas. The Switch+ uses far-field voice technology to provide voice control and is HomeKit-compatible, allowing users to control lights, music and other smarthome devices with Siri. The device has motion sensors and daylight sensors so that the lights can be activated…