It makes you wonder if this isn't a coincidence. Nvidia and Mac have pretended like the other one doesn't exist for several years now (since Apple adopted AMD and dropped NVIDIA about 4 years ago). Now, less than a week apart Apple breaks its iron curtain randomly to come out and tell us that they are making better Mac Pros and promises that they actually listen to customer feedback and NVIDIA announces mac support coming to their high end GPUs. Its a bit too crazy of a coincidence for me.
Once of the biggest requests from Mac Pro users was the ability to at least have the option to use NVIDIA cards. I had a Macbook pro (2013 i think) which had a dedicated NVIDIA graphics card in it, and then i upgraded to a 2015 model Macbook pro with the same specs (100% decked out) and noticed a huge drop in graphics performence due to the fact that I was stuck with the AMD graphics card (as Apple had dropped NVIDIA as their dedicated graphics card provider during those years). I really regretted upgrading my Mac and wish i could have my older one back which had the NVIDIA card.