How likely to people think the Marble GUI is to appear? The way people are talking about it almost makes it sound like a cert. Is there any links to the rumours about its appearance. I'd really love a new user inerface, not so fussed about being able to change my own themes but just a fresh looking option other than all the grey would be nice.
Apple OS look have traditionally been made to match the style of the hardware. For some time, the hardware (iMacs, display, Powermac) all had pinstripes, and the OS got it to. During the PPC to Intel transition, hardware was mostly white (iMac, Macbook) with no textures. Tiger and Leopard thus dropped the brushed metal look and small things were refined to make the OS looks "at home" on the current hardware.
Today Apple has the black glass plus aluminum theme going; it started with the iPhone and now you have it on the iMacs, Macbook, Cinema Displays, iPods. Actually, it's weird that the Mac Mini isn't all aluminum with a black Apple logo inside (like the front of the iMacs).
I expect "Marble" to have some black glass and anodized aluminum elements in it. The mockups of the new QuickTime already has the black glass look going. A faint anodized aluminum texture would look good actually, still gray (neutral color is important, the blue WinXP them drives me nuts every time I see it) but with a little grain to it. The blue scrollbar candy could be replaced by black glass. Still stands out (i.e. you don't need to search for the scroll bar slider) but has an updated look. I expect a graphite theme will stay thoug, with less contrast and saturation.
Did Apple do anything with Resolution Independence or does everything still look very off if you change the PPI ratio on command line? It was such a hyped feature for Leopard and I feel it was just abandoned. :-(