Oh, it's much more than that, so much more...
1. Final Cut Pro / Final Cut X debacle - almost all install base lost to Adobe on Windows because of that.
2. No more Xserves - what's a company with proper racks to do?
2. Mac Pro trash cans - no more upgrades, no more Black Magic card, etc., etc. So once old towers were not supported by new versions of OSX - guess what happened?
But, there it's even more - every shop that depended on anything Apple (software, hardware) got screwed, so they're not gonna put themselves into that position again.
Sure, there is a gorgeous 30 inch iMac on CEOs and graphic designers' desks - but that's about it.
Live by the iPhone, die by the iPhone...