I can't see how Apple's patent doesn't fall foul of this prior patent application
One or more pages are displayed on a touch display. A page-turning gesture directed to a displayed page is recognized. Responsive to such recognition, a virtual page turn is displayed on the touch display. The virtual page turn actively follows the page-turning gesture. The virtual page turn curls a lifted portion of the page to progressively reveal a back side of the page while progressively revealing a front side of a subsequent page. A lifted portion of the page is given an increased transparency that allows the back side of the page to be viewed through the front side of the page. A page-flipping gesture quickly flips two or more pages.
Even if this one hasn't yet been approved, it was filed in July 2010, nearly a year and half before Apple filed their application, which I can't see as other than a specific instance of this.
Doesn't the Microsoft application indicate prior art?
Or indeed, this demo for a Silverlight application from 2008:
PageTurn is the quintessential Silverlight 1.0 demo.