This is a walkthrough of whats new in the EPiServer CMS 6 RC 1 EMVP Christmas Special release. It will focus on UI function changes, since I haven't had the time to look to much at the API.
View mode/public templates
The only thing changed here is the RCA with new icons:

Top menu
The top menu is updated:

The eye leads to view mode, the question mark is help and the rest is the same.
Dashboard
A couple of new gadgets/icons added:

When enetering for the first time, no gadgets are added:

And the added gadgets/settings are stored after a recompile now! Hooray!
Edit mode
Not much have changed here.

WYSIWYG Editor
By default, Tiny MCE is used.

XForms
You can edit an XForm in Chrome atleast.
Admin mode
Nothing new in UI function design:

Drag and Drop of properties
You can now drag and drop any property on a page type in the admin mode.

Anything else?
Have I missed anything? Want better pictures? Post a comment.