Slowly dieing? Hasn't Apple faired better profit wise then most PC companies in the past few years? Not the industry, but company to company?
Back to the issue at hand. Apple's latest trend that seems to be pissing people off is naming something a point release, when it's oh so much more then a simple point release. Anyone that used 10.0 should notice a huge difference between it and 10.2. There was a huge amount of changes in 10.0 to 10.1, and the only reason they didn't charge for that was because so many were fixes, not improvements.
So, 10.3 or 10.5, the number doesn't matter, that's just perception. What matters is how much of a difference it makes. Remember, you don't have to upgrade, you can wait for 10.4 or later.
One quick note from apple rumor mill. The biggest change in 10.3 will be going from HFS+ to BFS. That's the way the hard drive works, for those that don't recognize it. BFS (Be File System from the old Be OS) is a fully journaled file system, something Apple has been working hard on lately. If true, that will be a big boost. Instead of my typing it all, check out an article on it here:
http://www.osnews.com/story.php?news_id=421&page=13