Bingowings said:

It would be great to see old Ben back on Tatooine where the story began (from a certain point of view) one more time.
Shame it couldn't be back at Ben's old hermitage.

Well story-wise, that is where Luke is supposed to have went to build his new lightsaber. Obi Wan had all the parts necessary to build a lightsaber back at his house. I'm not sure if it was in the original script or not but there was a good little paragraph about this in my Star Wars visual dictionary.