http://www.theregister.co.uk/2006/02...core_phone_os/

"With Nokia and Sony Ericsson about to launch single core, single chip phones using a real-time OS, Microsoft embarked on its catch-up strategy today.

It's a pressing issue for manufacturers, as a single core smartphone platform allows the OEM to cut the cost of materials considerably, or cram more features on for the same BoM cost, or both. But a single core smartphone only works with a Real-Time Operating System (RTOS) that's capable of running the CDMA or GSM signalling stacks, and that's something Microsoft doesn't have. Microsoft's phones need a baseband processor running the GSM stack, and a separate application processor core running Windows Mobile OS.

So riding to the rescue is that old favorite of vapourware announcements, the "reference platform"."