This is just my honest impression 
So, I've been using Parallels for a while to run various VM stuff, kind of got tired of it and decided to install bootcamp Windows on my Imac Pro (base config).
And oh boy was I impressed with how it runs!
Let's start with games. One of my favorites- Shadow Tactics: Blades of the Shogun. It's made in Unity and is available for both MacOS and Windows. Pretty good looking and not that demanding.
MacOS:
5k - couldn't even load, crashed all the time
2K - loaded up the intro and crashed right afterwards
1600x900 - kind of worked with some lag
Windows:
5k - fully functional with just a little bit of lag
2k - wonderful performance with over 60FPS
What a difference! And I know people will say that "game is not optimized for Mac" or "Macs are not designed for games" - that's absolutely true, but the same iMac Pro that can hardly play stuff in MacOS does wonders with Windows. And it's a wonderful gaming machine - sure it's not a GTX 1080ti, but in 2K it runs most games extremely well on the gorgeous screen.
Speaking of GTX 1080ti - why the hell Apple doesn't promote Macs for gaming with TB3 and eGPUs is beyond me
(well we know Timmy only cares about iPhones at this stage, but anyway) - that could easily push them into the gaming market. Doesn't work with MacOS...but works in Windows with no problems. I've tried my 1080ti eGPU and everything on Ultra in 2K is just wonderful.
Now let's get into the more serious stuff, Premiere Pro - that was another shocker. Checked the rendering times, they are down like by a quarter! Wow! Again I don't know what Adobe thinks about Mac and Windows, just my observation.
Boot and restart times - actually faster in windows.
Overall I'm just very impressed with Windows on the iMac Pro - didn't have any scaling issues, works blazing fast, the majority of the apps that I use are also available, and gaming is an absolute joy on this (as opposed to MacOS)
By the way this is all just my opinion, if you love MacOS I have absolutely no objections to this - but at this stage I noticed that just don't want to boot back into MacOS
the only two things I miss are Final Cut (yup, it's still the best One-Man-Army video editor in my opinion to this date) and a proper notification system (windows as far as I understand doesn't force all apps to use the same notification rules, so there are quite a few times when I get messages on slack/whatsapp with a number pop-up but no proper notification), everything else is very impressive.
So, I've been using Parallels for a while to run various VM stuff, kind of got tired of it and decided to install bootcamp Windows on my Imac Pro (base config).
And oh boy was I impressed with how it runs!
Let's start with games. One of my favorites- Shadow Tactics: Blades of the Shogun. It's made in Unity and is available for both MacOS and Windows. Pretty good looking and not that demanding.
MacOS:
5k - couldn't even load, crashed all the time
2K - loaded up the intro and crashed right afterwards
1600x900 - kind of worked with some lag
Windows:
5k - fully functional with just a little bit of lag
2k - wonderful performance with over 60FPS
What a difference! And I know people will say that "game is not optimized for Mac" or "Macs are not designed for games" - that's absolutely true, but the same iMac Pro that can hardly play stuff in MacOS does wonders with Windows. And it's a wonderful gaming machine - sure it's not a GTX 1080ti, but in 2K it runs most games extremely well on the gorgeous screen.
Speaking of GTX 1080ti - why the hell Apple doesn't promote Macs for gaming with TB3 and eGPUs is beyond me
Now let's get into the more serious stuff, Premiere Pro - that was another shocker. Checked the rendering times, they are down like by a quarter! Wow! Again I don't know what Adobe thinks about Mac and Windows, just my observation.
Boot and restart times - actually faster in windows.
Overall I'm just very impressed with Windows on the iMac Pro - didn't have any scaling issues, works blazing fast, the majority of the apps that I use are also available, and gaming is an absolute joy on this (as opposed to MacOS)
By the way this is all just my opinion, if you love MacOS I have absolutely no objections to this - but at this stage I noticed that just don't want to boot back into MacOS