Are there any far predictions for the wasteland?

In the ending slides of Fallout 2, it is mentioned that Arroyo develops into a prosperous city, with a rather promising picture of a huge modern city. Just wondering if we know anything about the far future of the Fallout universe.

http://fallout.wikia.com/wiki/Arroyo?file=Fo2_Arroyo_Ending.png

Edit: grammar