I hope they keep the improvements of NV, but keep the environment and story of Fallout 3. Fallout 3 is by far my favorite game of this console generation and the only game to breach my top 5, and I think it was really due to the feel of it. The DC wasteland really felt like an apocalypse... whereas the Mohave wasn't nearly as depressing. It didn't feel like a true apocalypse. Both were great games and I hope they continue their success with Fallout 4 or whatever game they decide to make.... but if Obsidian works on it... please fix your bugs.. New Vegas was worse than Fallout 3 was.