Ah, but YOU'RE missing the point completely. As resolutions inscrease the interface can scale up because it is resolution independent in 10.5. Web pages are NOT resolution independent for the most part. Photos, graphics, interfaces are not. So, when you're looking at your killter 3000x2000 monitor yes your icons and OS interface can scale up and your photos will look very crisp BECAUSE they are vector or have extra resolution to draw from. Websites on the other hand will be fixed at 800x600 or whatever and unless you want them to be miniscule on your screen as they are shown pixel for pixel, they will have to be blown up in some way.
So the res independence IS a good thing and just fine UNTIL the monitor resolutions go through the roof for the same physical screen sizes.
There are too many things outthere that are desinged WITHOUT the independence. Icons inside nearly every application for example. All kinds of stuff. My guess is that this won't affect too much too quickly. It just addresses some issues with the current interface on high screen monitors.