I JUST downloaded CS5. First thing I wanted to test was content aware fill.
I just pulled up a shot with a large portion of it filled with a horse. Thought, what if I wanted to put a different horse in that background (not really, cause it ain't that great a shot to begin with, but it has a busy background so thought it would be a good test).
Here is the before:
Here is after about 4 minutes (64 bit mode) of processing after clicking:
I thought it did a darn good job that would have taken me at least an hour.