Just got a new 15" powerbook on Aug 11th. Wouldn't you know they anounce tiger the next day and it is using core image. Not new news really but now after investigating in depth about core image and core video I see that OS X tiger is going to utilize the video card vram ever so intensly. So now on top of Quartz Extreme using the video card for os rendering Tiger will use the vram in the video card to render images and video. You might be able to get away with 64mg but with this kind of utilization 128mb vram seems like a must have upgrade to me. I was able to return my powerbook yesterday for the 15" upgraded one with the 128mb vram and the 100gb hd. I feel much better now. On top of that the 128mb version supports apple 30" display. THat might not mean anything now as I am not going to dump $3000 on a monitor but as prices fall they will become more viable. Before we know it that 30" will be below $1000.