@abcd1211: It is completely fair. A patent is merely an exclusive right to and invention for the public disclosure of said invention. An invention does not constitute a physical creation but merely can be imagined and documented. These are as defined by US law which governs said parties in this matter.
NOW, on the other hand... this problem here exists in that the invention must be new, non-obvious and useful (subjective). For MS to argue that a digital book page turn is new could be debated but them to argue that it is "non-obvious" would be ludicrous. It would be like me asking for a patent on video games in which digitally represented cars in the games make sounds that mimic real cars.
IF this becomes a blow up lawsuit of some sorts, I could see this paving the way to basically say that a digital representation of anything that occurs in reality is not patentable. If two apps exists that show a nature scene and one has a tree fall down periodically, is that then patentable and enforceable if the competing application shows a tree fall down? I mean, we can really see how that would be ridiculous.
HOWEVER, on the other hand, I am in full support of allowing patents on the PROCESS, not the representation. The process being more stringent. IF they managed to come up with a unique way of making it happen as opposed to just the visual representation, they should go for it.
I'm not an Apple fan, this is true, and MS is how I make my livelihood (VB/c# programmer) but seriously MS... a patent on turning a page?