I think i would use the share button a lot. I wish i had such a feature when playing skyrim. Just screen caps of the scenery would have been awesome. To be able to rewind and upload a video of something funny in assassins creed 3. Not to mention being able to record multiplayer matches like COD.
The controller looks good to me. The analogs look further apart, I really hated how close the analogs were on the dual shock 3. Triggers look better shaped, but still look like they are made from the same slippery plastic that the DS3 has. Dpad looks bigger. Analog tops look better for grip, and overall the controller looks more comfortable to hold.