iOS apps on the desktop and the switch from x86 to ARM have uncomfortable many parallels with Windows 8 / RT.

How is Apple's approach going to be different from Microsoft's? Will they keep backward compatibility? Will the CPU architecture really be a day and night difference or are our expectations too high due to the ubiquity of inflated Geekbench numbers?

This will either make or break the Mac as a platform and I feel like currently, any further investment would be a gamble.