Very curious to find out for all those that have a PowerBook, as to what are you holding out for in future versions of MacBook Pro's instead of purchasing the latest C2D Version today. I was very impressed with the specs, but personally it's not enough for me to ditch my 18 month old PBG4. For me what will tip the scales is: - Waiting till my machine has reached the 2 year milestone, more so to reduce any buyers remorse of having a rapidly outclassed machine. - Robson Cache: Really curious to see how this new technology will work. Who knows it may come to nothing, but I use potential technology as a way to prevent myself from rushing in every update! - UXGA+ 1920x1080 on the 15.4" display. Especially with the possibility of "Resolution Independence" in Leopard. Dell does it, admittedly I have not seen a machine with that res in person. - Possibility of design change? - Possibility of Apple going with nvidia (GeForce Go 8xxx maybe on the horizon?) for it's graphic card's. Or even sticking with ATi but updating the card. - Waiting till Leopard is released, that way I will not have to pay for the upgrade. What about other current PowerBook owners out there? What will tip the scales for you?