Apple's Siri expected to expand to the app universe

Apple is set to unveil a new and improved Siri, the personal digital assistant, and widen its reach, to Mac computers and third-party apps. Philips Hue is now compatible with Apple Home Kit, meaning you can use Siri to control your lights. LOS ANGELES -- Siri is expected to expand beyond the iPhone and iPad to third-party apps and Macs, a move designed to hike the usefulness and IQ of Apple's personal digital assistant. Analysts who cover Apple predict an expanded role for Siri will be one highlight of Apple's Apple Worldwide Developers Conference, which begins Monday in San Francisco. Apple did not respond to a request for comment.