Smart sharpen is indeed a good adition as well as surface blut which will get a lot of use here I would imagine, makes a great job of smooting with out damaging edges like smart blur but better (nneds to be faded though I find)
Smart Object is great when you use repitions of objects in one piece. It was a bit disappointing that if the same smart object was used in multiple documents it could not update them all. I did find a work around using illustrator objects but it has more potential to fill. It needs to be like flash where you can updated library objects at it will look at the external file.
Warp is a nice feature, of course it works best with clean sharp objects. I would like to be able to change the mesh settings but I don't think that is possible.
Bridge is OK ,but take extra resource and slower to load than browser. But so far no problems like some users have reported.
Took me a while to figure out some of the new layer options like "create clipping mask from linked" has gone and now you use the alt key and click inbetween the 2 layers.
Noise reduction so far very good, may replace third party options.
Vanishing point rules. I advise using this for all cloning, just draw a non perspective grid. Reason why, because you get the preview brush which make lining up the clone so much easier to work with especially if there are any lines, patterns in there, how often do we sample go to lone and slip a bit with the alignment so have to undo and go again.
Oh nearly forgot, lens correction filter is a grat add on, saves tweaking with perspective and and or distort, then pinch for barrel distort or maybe you use Richard Rosenmans plugin, well this filter makes lens correction simple.
Not played with variables but may have some nice potential for the web graphic designers.
Spot healing is a welcome addition to the clone and heal suite.
After holding out while every other graphic packaged added one "red eye tool" it works well and is a quick fix. Some cases will still be better (as always) with a manual intervention.
I think that covers what I have used or tested latley.