I still have a Windows machine and work with Microsoft servers on a daily basis, that being said there's simply no comparison to the Mac OS IMO, it's simple, robust and for the most part very clean and hassle free.We should be able to know more in 2 weeks. Following iMac recent update history I would say yes (October 2014, October 2015). A small delay could be related to kabylake CPU.
I have been waiting for an issues free iMac for 3years. I hope they don't do anything stupid this year. I won't wait another year. After 9 years I am not happy with apple quality anymore. If they want to focus only on iOS and iPhone it is time to return to windows.
In fact, I was about to just go back to my Windows machine after the second MBP motherboard crash but Windows 10 keeps forcing updates and suddenly it won't boot up unless I unplug my USB peripherals anymore. The way they handle things is mind boggling sometimes. For personal use, I'll stick with Mac.