Hi,
Sharing my experience upgrading my CentOS 7.2 to 7.3 this morning. I had to use kernel-ml 4.8 for its support of Skylake on my Dell Precision 7510 laptop. This morning 4.9 came out but I don't felt like trying it, because of the possibility of breaking my ZFS and nVIDIA stuff. So I decided to give the 7.3 in CR repo for a try.
The upgrading was smooth. The only problem was that I had to reinstall nVIDIA proprietary drive because my nouveau blacklist was gone. I also had to run restorecon on /home because all labels were wrong. That broke Chrome and many other programs that need to access files in user home. I have no idea what's the cause yet.
3.10.0-514.2.2.el7.x86_64's support for Skylake is great. I see no difference between it and the previous 4.8 kernel I used.
Then I was surprised when another CentOS also got all the 7.3 packages. That's when I realized that 7.3 was officially released this morning!