No plans for 7448 upgrades anytime soon. The price for the chips is just too high!In addition, current Apple's contract with Freescale is only concerning CPU spare parts for replacing defect CPU or entire motherboards. So the production rate and volumes for those CPU will not be impacted by their use in computers, but rather reflect the status of the market for embedded CPU.
So the market of CPU upgrade cards still very active today, should decline quickly in a near future. G4 processors will probably not be sold at much lower price allowing their integrations into CPU upgrades, and using PPC970 aka G5 would require heavy R&D investments (compatibility, cooling, etc...)
In addition, MacIntels are powered by soldered CPUs (MB Pro), not designed to be exchanged, or using a socket, making CPU upgrade really simple. Let’s expect that Apple does not prevent CPU upgrade in MacIntels by using some firmware tricks as it happened in the past; it would not be a good marketing and communication action, and for sure will not help PC users to switch.
