If there was a subtle change made, it would probably be moving to the more metal interface, or perhaps adding a panther pattern to the OS X page. Apple.com is nothing too flashy, but it seems to be kept fairly simple and clean, and standard across pretty much any modern web browser. Now take microsoft.com. If you aren't running IE 6 on a PC, they ditch a bunch of the flashy features, either to restrict non-IE users, or because they realize that too much glitz generally is very difficult to make standard across all browsers and platforms.
I'm probably going to be the odd man out here, but I feel that Apple's web site isn't that easily navigable. They do a good job in featuring their top five items of the moment, and a few more important areas (Quicktime, Mac OS X, Store). Perhaps even making the Hardware and Software links more prominent tabs would help. Ultimately, something like drop down menus with nearly all items (or the top 20 items) might be useful, but then that would probably destroy Apple.com's simplicity.
However, I feel that their store is quite well done. Very straight forward and easy to select items. If I ever go to a site like Dell's, I feel somewhat lost, and end up going through pages and pages worth of options. Also, some of these PC companies are suffering from what Apple had a problem with in the mid-90's...just too many different versions without enough differences between the various models. Perhaps the PC companies would be best off just offering three types of consumer/business machines: 1) no-frills business workstation. 2) A middle of the line computer for either home or business. 3) A work horse for super computing and games.
Apple has done a decent job in trying to draw lines in the sand to differentiate who needs what type of computer, whether it be a PowerMac, an iMac, Powerbook, or iBook.