While very little has actually changed in this new version of Photoshop Elements, one area you'll see some differences and expansion is in its Guided Edit mode - more techniques and slicker visuals.
This video is all about a new feature called Shake Reduction - you can use it as an AUTO function or manually control where in the shot the shake reduction is applied.
It works quite well- essentially adding contrast and sharpness to the affected areas. It really depends on how bad the camera shake is to start with. Some of the examples I tried just looked over-sharpened. Nice idea but don't expect miracles...
The video below highlights how to get a better, more accurate selection using the Refine Selection Brush Tool.