Microsoft's 
Microsoft's first big update to Windows 10 this year, the Creators Update is now starting to hit compatible Windows PCs or can be enabled using the Update Assistant.
Featuring a number of new features and improvements skewed towards creatives and designers, Creators Update is the first of two large system updates happening this year with the Redstone 3 update expected in Fall. I've just installed the update on my Surface Book and while there aren't any visibly dramatic changes, there are various subtleties that I'll need a few days to take note of.
As with any major system upgrade, there are a number of things to consider. If you use your PC for work or for anything of a critical nature, you may want to hold off until all the drivers and apps have been updated to work with the new OS. Also, it is strongly advised that you backup your files and system before heading off into your update. Creator's Update will trickle as an option on compatible devices in the coming months.