Nothing much earth-shattering that I've seen. Photoshop seems to have the most changes. It has a few new blur filters; a 'select focus option' and a new package feature since smart objects can now be links. Can't say I'm enthused about the necessity for packaging Photoshop files.
Has Typekit font support in Illustrator and Photoshop. Pen tool should be less twitchy in Illustrator. InDesign swatches can be grouped and tables are easier to edit.
In testing I've been able to open up CC 2014 files in older CC versions of Illustrator and Photoshop, but not with InDesign CC and CC 2014.
The update notes lists "text engine enhancements" with Illustrator so I'm a little leery about type reflow with legacy docs.
Definitely not the updates that we'd have seen in the pre-subscription days.
Here's a few links to the new features summaries.