You're probably right, in an "Apple vs. Microsoft" world, but in environments where Microsoft isn't the knee-jerk default for everything, a combination of Apple for the desktop/workgroup management and *nix for the production side is VERY compelling, cost effective, reliable, and competitive.
Not every move that a company makes is designed to immediately take on the biggest bully on the block. Despite not releasing beta after beta, Apple generally gets it right for what their customers want, at least in the consumer world for now. I think the changes in Leopard Server are indicative of them starting to get it right for the business world as well.