I'm thinking that Lion might be the last of the cats. "Lion" is the king of the jungle. How do you top that? Also, I think the rest of the cats are much smaller and less known. It would seem like a let down after Lion. So, if this is true, what do you guys think will replace the cats? Even if you think they'll be a few more cats, "Felix", "Garfield", etc What will come after cats? Something to consider is there's no reason why there has to be ten. OS X doesn't have to end with 10.9. It can go on to 10.10, 10.11, 10.12, and so on. I doubt Apple will want to do away with the all too familiar "X". It has powerful branding now.