[RayChuang88]

I think Apple sales have remained strong because users of older PowerPC Macs switched over to Intel Macs in a big way to prevent finding themselves useless due to future MacOS X versions going Intel-only support. I've read that MacOS X 10.7--of which early alpha builds probably exist inside Apple's development labs--may run on Intel CPU's only for maximum code optimization reasons.

Hardware-wise, Apple iMacs and Mac Pros are excellent machines, though I wish Apple would provide more ergonomic keyboards and mouse pointers (I hope Logitech develops an Apple-specific version of the Desktop Wave Pro keyboard/mouse combination).

[RightOnTheLeftCoast]

"I think Apple sales have remained strong because users of older PowerPC Macs switched over to Intel Macs in a big way to prevent finding themselves useless due to future MacOS X versions going Intel-only support."

That's an interesting thought but does not compare at all with my own observations or experience. Here in RightOnTheLeftCoast Manor, for my family and work we have (let's see...) three PowerPC Macs, two Intel Macs, two Win 7 PCs, three Win XP machines, four Linux PCs, two 68k Macs, and a Sun Sparcstation 2. All are running and doing their jobs, some (can you guess which?) with more hassle than others due to malware infestations, despite all precautions. Our older Macs are running flawlessly, and we have had no sense of urgency to upgrade. And such is the case with my Mac-using friends and colleagues.

Near as I can tell, your contention of Mac sales propelled by upgrades has no basis in reality. If you have a citation to support your notion, please post it.