I'm pretty sure that Apple's design patents are going to be invalidated -- I just think that Samsung should have sought to do that when Apple first approached them about these issues rather than now. Samsung got many nasty letters from Apple before this whole mess began and the best response would have been to file to invalidate their iPad design patents and community design registrations (in the EU).
The reason I think that Apple's design patents are going to be invalidated is because the JooJoo was shown in the media months before the iPad and it looks almost identical. This
story ran on December 7, 2009. Apple filed its iPad design patent in the US on January 6, 2010 (the opening day of CES 2010).
Now while I am
not saying that Apple copied the JooJoo or was even inspired by it -- there is no way they could about-face and redesign a mere month before they announced and showed a working iPad -- but I am saying that the two companies independently arrived at the same design for a tablet.
Why is that? Because both designs borrow heavily (or were inspired by) the iPhone and iPod Touch. I think that the only legs Apple would have to stand on here is the design patent for their iPhone and iPod Touch. But the claims for those patents simply read
"The ornamental design for an electronic device with graphical user interface, as shown and described." The patent also includes a series of images and a reference describing which part of the device the images are portraying and a disclaimer saying that the pictured user interface is for example and not related to the design being claimed.
So the fact that they claim an "electronic device" makes it kinda broad, but the images leave it to a judge's interpretation as to how close one design is to another. I don't see a judge looking at the drawings of the iPhone and looking at a Galaxy Tab and finding infringement. And since the JooJoo serves as prior art on the iPad design patent, that leaves Apple to resorting to "Trade Dress" issues in the USA at least.
Disclaimer: I have no knowledge of how community design registrations are enforced or interpreted in the EU, nor do I know how design patents are enforced or interpreted in Australia. All I can do is make some assumptions based on a basic understanding of US patents.