Nobody has mentioned it yet. Intel's WiMax might be built into a unified package like the Centrino was. This makes it cheaper than for Apple to purchase IBM CPUs (which are expensive anyway) and WiMax chips seperately.
It looks like Apple is going to take on the Wintel computer makers directly and take the lead in promoting WiMax, they have always been at the forefront of promoting wireless networking. So we'll be seeing dual dualcore CPUs on in the Power Macs, which might go back to using a numbered scheme such as 8xx and 6xx based on Intel's chips. PowerBooks with dualcores, etc at prices equal or better than the competition. With the iMac, iBook and Mac mini range the prices should be very competitive and machines updated much more frequently than is possible with IBM or Motorola. So no more six month waits for updates which makes customers indecisive. The most important factors - WiMax for downloading HD movies for rent or purchase; and Intel chips with built in DRM to protect against piracy. With both in place film studios will have the faith in Apple to make content available through an online movie store. Without those it won't happen. This is how Apple will monopolise both online video and music.