Why do people always call Fallout 3 "Fallout"? There were two before it (made by Black Isle) and one after it (made by Obsidian). Bethesda only made Fallout 3.
OT: Yes, much better.
Adding the "3" is unnecessary. The context makes it extremely obvious that we're not talking about 1 or 2, and New Vegas is so technologically similar to 3 that it doesn't really matter at all.
Although, if they want to make a 2D isometric TES game, I'm totally down for that.