Not too sure why Adobe didnt call the latest Photoshop “CC 2016.6” but I’m sure they know better.
Small incremental improvements though as its a full install update you will need to reinstall any plugins that you use.
If you do decide to install then click on the advanced install options and select to keep your previous version of Photoshop so you can go back to it easier if things go South.
The only really useful thing I have found so far is that there is that when selecting “quick mask” the layer dialogue changes to show the quick mask colour you have selected, this is a real improvement for me as its an emotional/visual clue as to if you are in quick mask mode or not and is much better than the previous light grey/slightly less light grey cue from earlier versions.