What are the main improvements in tools or abilities that a user can experience when he will upgrade from CS6 to the latest CC version for Adobe Pshop, Illu and Indesign?
I went from CS4 at home (been using the CC software at work for years) to the latest version of CC at the beginning of the year because I was given a free year subscription. It's hard to list off all the tools that are new or improved that I use because I find myself just going about my work the way I did before the upgrade. I'm sure there are some, just none that jump out in my memory.
I know a lot of people love the CC Libraries that allow you to easily sync files across computers, but since the IT department at work considers it too large of a security risk, we can't utilize Libraries here. I only have one computer at home, so I personally find it pointless to store my files/assets/etc. in the cloud, so my use is limited.
I do know with a Creative Cloud subscription you have full access to all of Adobe's mobile apps. I have used the Adobe Capture CC app on my phone quite a bit. With it you can create custom patterns, brushes, etc. with the camera on your device and then pull those up through the CC Libraries that I mentioned.
Adobe does have a site for each app that lists the major changes with each release that goes back to 2013.