There's also a new Content Aware option in the Fill dialog box, which is pure magic for removing objects from photos. Simply put, Elements analyzes pixels surrounding your selection and then intelligently fills it. If you have plenty of free background pixels around the selection (grass, sky and so on), it works wonders! While you can remove very small items using iPhoto's Retouch brush, you can't really zap anything larger.
If you've exhausted iPhoto, or if you're a beginner looking to be more creative, Elements 13 gives you some very nice new features; however, with enough skill, you can do all of that stuff in version 12's Expert mode. That said, if Elements' old photo email system drove you crazy, or if you routinely remove objects from your photos, you'll benefit from the upgrade.
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