Downloaded it...tried the new features....WOW.
There are more than a few improvements. The new quick selection tool is working great, especially with refine edge. With these to it is much more intuitive. Further opening jpg as a camera raw gives a whole new set of possibilities. The vanishing point tool is pretty much enhanced in a positive way.
Auto align and auto blend worked well for my panoramic photo's and zoomify can come in pretty handy for web-use.
most of all I like the new cloning palette, where you can get 5 cloning-points and the most wanted en renewing one is the smart filter. Filters are grouped under the actual layer so you can play around with them and than even can paint on the mask to leave a particular part of the picture out of the filters.
I think they did a very well job overthere