Maybe, if they created a hybrid system, using the arm chip for lower power stuff and to extend battery life like working on pages numbers etc then you fire up a clu intensive app like a game or photoshop and the os fires up the intel chip. Kind of like dynamic gpu switching for CPUs. Maybe it could all be done in the os so that developers don't have to encode for arm if they don't have to. Just don't take the intel away. Or go the amd rout and design their own x86/x64 compatible processors
For computers but Apple's largest money maker runs ARM chips so even if their Macs stopped selling as much because of a move away from Intel they'd still be fine.
This has been talked about for a while now, so why all the surprise? Furthermore, even though legacy Windows apps won't run on ARM, it would appear that MS has been working for a long while now on getting a new version of Windows ready on ARM (which is what Windows RT is right now). But MS is wanting a full 64-bit version of Windows on ARM, and they are working full speed to do it:
http://techland.time.com/2012/07/16/arm-vs-intel-how-the-processor-wars-will-benefit-consumers-most/
http://www.techcentral.ie/20228/arm-working-with-microsoft-on-64-bit-windows-os
http://blogs.msdn.com/b/b8/archive/...ndows-for-the-arm-processor-architecture.aspx
And since Apple's custom chips are built on an ARM architecture, it is highly likely Microsoft's new 64-bit Windows for ARM would run on those chips. What that means is, we could still run Windows-for-ARM in virtualization or Boot Camp, but we simply would not be able to run x86 Intel Windows and associated software. For that, we'd need to keep an old PC or Intel Mac around.
All said, it doesn't look like Apple would really lose much if Windows eventually is compatible with Apple's ARM-based chips. And so long as they are just as fast or faster than Intel's DESKTOP chips (such as those in current iMacs, like the i7 QuadCore's), I will be largely satisfied.
So am I to understand that you'd rather be using PPC?
Actually, that could be good! x86 architecture has so much flaws and unnecessary legacy stuff...
ARM CPUs are also very energy efficient. In example, Nufront 2GHz CPU, which uses JUST 2 Watts !
While Intel CPUs could eat up to 100 Watts.
Give me fanless operation on a MacBook Air which can run all day long (say 12 hours) on a single charge, while providing comparable processing power to today's MBA, and I guarantee you I will.
Unfortunately, ARM 64-bit is not available yet.
But that will change in the future.