I did the upgrade but I noticed no difference whatsoever to the 13.x that I had been using before.

I actually wasn't hoping for any changes other than being able to run 'skype' again (I broke the 32 bit libraries that skype 'needs').

Had it not been for skype working again and a small change in how the folders are rendered in the 'save file' dialog box, I don't think I would have guessed that my OS had been upgraded.

Maybe that is the future of upgrades - no perceptible difference whatsoever.