The biggest change, for me, is the comments. Compare the old listing:
With the new:
Not just a change in look, but the amount of information is also different. The threaded relationship of conversations are visually represented now. A full fledged "comments section" for any web page.
It used to be that SharedCopy is about keeping a copy of a web page - and placing annotations on top. But its become quite clear now, that there's something else as important (if not more so). To paraphrase a famous saying,
"Its the comments, stupid"
Let's see where this realisation takes me.
I'll leave you with a whirlwind tour of the revamped application (1 minute only!). A little video clip I did with my Macintosh: