A few thoughts on this....
- Current Macs, even those 2, 3, 4 years old are still exceptional machines that outperform mid-to-high range Windows computers any day of the week (not talking clock speed, but general productivity and problem-free operation). So there's no urgency for an upgrade that will satisfy an unmet need other than having the latest and greatest.
- Apple is definitely distracted by iOS, both software and hardware, and it's clear to see why. The future is mobile. But the Mac remains an integral part of Apple's operations. Can you imagine them designing the next iPhone on a Windows computer? No. But I do take Tim's response with a grain of salt. How intimate is he with the Mac, the user experience? I've observed issues that have persisted for months or years, with complete silence and inaction from Apple.
- People that email Tim directly are ... (blip).