I'm pretty sure the response from Apple is: "Bring it on, monkeyboy"

Exclusive: Microsoft's Ballmer Throws Down Gauntlet Against Apple

Declaring that Microsoft (NSDQ:MSFT) and its partners had in the past "ceded some of the boundary between hardware and software innovation" to Apple (NSDQ:AAPL), Microsoft CEO Steve Ballmer told CRN in an exclusive interview Monday that the company's Surface tablet marks a new era in which the computer software giant will leave no "stone unturned" in its innovation battle against Apple.

"We are trying to make absolutely clear we are not going to leave any space uncovered to Apple," said an exuberant Ballmer in a 30-minute interview after addressing some 16,000 partners at the company's annual Worldwide Partner Conference in Toronto. "We are not. No space uncovered that is Apple's.

More:
http://www.crn.com/news/mobility/240003421/exclusive-microsofts-ballmer-throws-down-gauntlet-against-apple.htm