Yeah, that will be the most exciting change from NetApp this year...a new hardware platform. I don't follow the leap of faith to that replacing the FAS3000 though, it would more likely be a service provider/cloud system for those customers who are offering either managed services or global cloud solutions too large to worry about a FAS6000.
Of course I rather suspect that "selling its (ONTAP) software separately from the FAS array hardware soon" is more likely to play the biggest part in their most exciting announcements as this would allow their software and features to be implemented directly on top of services like Amazon S3 and Azure so that smaller customers can replicate directly to the public cloud. Add that to their "Switch" technology (might have been renamed, I forget) and you've got yourself a quite compelling offering which would be capable of migrating between hypervisors, from virtual to physical, between NAS/FC/iSCSI, and to/from private/public cloud solutions in seconds.
Of course HP are able to remove all your zeros in transit, so NetApp will still have some features left to implement ;)