Maybe they'll discontinue using cat names when they reach Mac OS XI, because it'll be a new OS clearly seperating itself from Mac OS X. However, what new name convention could they decide to go for? I personally love the current names!

By the way, Apple trademarked several cat names including Tiger, Leopard, Lynx and Cougar in 2003! The trademarks were filed under the category of "computers; computer software; computer operating system software."