I want many of those changes to happen, but I think you're being optimistic.
I think Apple will keep support for Conroe (Core 2 and its contemporary Xeon counterparts) for another OS release. Conroe was one of the biggest performance jumps between Intel processor generations in some time, and Apple used the NVIDIA 9400M IGP to give their Core 2 computers passable graphics performance.
I probably am being optimistic you're right. I also hope you're right and they do keep support for Conroe, I currently have an iMac and Macbook Air both running Core 2 Duo. Not sure I will buy Apple hardware again anyway as currently I just want an i7 in a desktop chasis. More and more of what I do is virtualised (be it Vagrant, remote servers etc) so I just need power at a reasonable price.
I think Apple will keep support for Conroe (Core 2 and its contemporary Xeon counterparts) for another OS release. Conroe was one of the biggest performance jumps between Intel processor generations in some time, and Apple used the NVIDIA 9400M IGP to give their Core 2 computers passable graphics performance.