AWESOME new addition by Adobe. It's called the Character Animator. It actually animates artwork (from Photoshop or Illustrator) by capturing your performance using a camera and microphone, reproducing your facial expressions, synchronizing mouth movements to your speech, and giving you control over all aspects of a character’s movement through the mouse, keyboard, and programmable behaviors. A bit like a custom 2D gaming character that you have control over.
It takes out the need to create the animation key frame by key frame. You can export an image sequence to After Effects to make edits & tweaks.
Like any new feature I'm sure it's got some quirks but it does look promising. Can't wait to give it a try!
Photos & screenshots from Adobe.com