firewire makes the difference?
I agree on the display. Even though most consumers are buying monitors less than 1080p because of price (1600x900 for $99). Mac users don't even realize their monitors are higher than 1080p.
USB 3.0 is faster than firewire and more readily available, than both firewire and thunderbolt, with accessories. Consumers are more comfortable with USB. Which is only 2.0 on the iMac. Apple will prob kill firewire in the next 5 years or so and go solely thunderbolt.