The only thing disappointing is gaming performance compared to old iMac.Hah. Yeah. It's really annoying the absolute nonsense about the 5K iMac being spread about. It's ALL about the screen. The rest is absolutely disappointing. I guess it's a good thing the screen is so darn good.
But then: Who buy's a Mac for gaming? And its not that You can't game at all.
I didn't bought the iMac for gaming, but I am quite surprised how good You can play on it.