Some corrections:<P>jonah writes:<P><BLOCKQUOTE><I>True, you can resize icons in almost every other OS, but you are still limited to the 32x32 pixel, 256-color icons. The MacOS 9 is the same. Technically, you can have 16-bit color icons, but this is only used by about a third of programs out there.</I></BLOCKQUOTE><P>Mac OS 8.5 and later have icons that range in resolution from 1-bit to 32-bit (with an 8-bit alpha channel), and sizes from 16x16 to 64x64. Most post 8.5 Mac OS apps (and the OS itself) include 32-bit icons.<P>resteves writes:<P><BLOCKQUOTE><I>They keep mentioning that you can have the finder revert back to "classic" look (OS8/9) I don't know how completely, but we will see.</I></BLOCKQUOTE><P>I didn't hear this at all in the keynote. Jobs mentioned that you can use the new Finder just like the old one if you want (i.e. ignore the "browser" thing and just open many windows as usual). He also demonstrated that "classic" Mac OS apps retain the Mac OS 9 appearance. All other apps (Carbon, Cocoa, and presumably Java) get the Aqua appearance. No "themes" of any kind were mentioned.<P>xwred1 writes:<P><BLOCKQUOTE><I> I hope that some of this stuff is revertible. The icons at the bottom looks kinda pretty (Res is definatly better than windows), but take up WAY too much real-estate in my book.<P>...<P>Lastly, in finder, those freaking icons a humongous. If i were using that system, it would feel like an arrow in my leg or something. I can't stand huge icons. Icons are icons, they're supposed to be small. </I></BLOCKQUOTE><P>Both the dock icons and the desktop icons are dynamically scalable from what looked like 16x16 to 128x128. This was demonstrated in the keynote. The dock is also hide-able much like the Win95 taskbar (and I'm sure you can turn it off entirely, even if it means killing the process or something). And I expect that the dock itself will be replaceable by 3rd parties.