The Surface Tablet is Confusing
Back to Microsoft: Cook was ostensibly talking about both the Surface and Galaxy tablets, but reading between the lines, you can tell he's taking a jab at Windows 8's dual-natured interface, which has been called a 'cognitive burden' by usability experts.
From Businessweek: "What I see, for me, is that some of (Apple's competitors) are confusing, multiple OSs with multiple UIs. They steer away from simplicity. We think the customer wants all the clutter removed. We want the customer to be at the center of everything. I think when you start toggling back and forth between OSs and UIs, etc., I don’t think that’s what customers are looking for."