Following Intel's unveiling here of a dual Windows 8.1 and Android processor for tablets and computers, Sullivan said it's unlikely that Microsoft will support a dual OS. "A dual OS creates a lot of complexity for users," he said. It's not clear whether he was referring to just Windows Phone devices or also to tablets.
Following reports that Microsoft wants to reduce the number of operating systems it offers, Sullivan said "it's important to support both" Windows RT 8.1 for ARM-based devices and Windows 8.1 for Intel-based devices. The debate at Microsoft is whether it will continue "Windows Phone or Windows RT -- that's the question," Sullivan said.