I mean, aside from it being the fastest single core Mac of any kind ever made, and the fourth fastest multi-core Mac ever made, and one of the biggest performance jumps the standard iMac line has ever seen going from four cores to eight with a workstation class GPU—yeah sure it was no big deal that brought nothing new.
This thing is a beast for the price. Linus Tech Tips even said it's pretty reasonable compared to building your own PC. I love mine. The Mac is mature at this point. What were you honestly expecting—a 6K display in the standard iMac before the iMac Pro or Mac Pro? Maybe in the next update it will fart rainbows too. It's a freaking computer. If this doesn't suit your needs, wait for the next iMac Pro with the 31.5" 6K liquid retina display option. It will likely start at $5999-6999. You can buy that instead.