» Tue Dec 29, 2009 10:09 am
It will most likely have the same gameplay style and engine as Fallout 3. Pete Hines said it will be in the same style as Fallout 3, and they have only a year and a half to make it, so it will most likely use the Fallout 3 engine and assets.
However, given that it's being made by some of the people that made Fallout and Fallout 2, it will also likely have better writing, story and choices & consequences than Fallout 3.
See:
http://fallout.wikia.com/wiki/Fallout:_New_Vegas_FAQ