Hassknecht said:
They really can't just be vague on wether House or NCR or the Legion won Hoover Dam if there's going to be a game set anywhere near the West Coast.
They would really only have to take a firm stance on whether the Legion or the "good guys" won unless they wanted to make a direct sequel to NV. Functionally speaking, there'd be very little difference between the independent, House, and NCR endings to anyone not living in the immediate vicinity of Vegas.
If House wins, he keeps his operations compact and unobtrusive and occupies himself with his own interests as always. He might expand his sphere of influence to include a few industrial facilities as his plans progress, but not much else. He fosters a continued NCR presence in the area, as they're the necessary fuel for the economic engine of his grand plan. Securitrons keep order on the strip, Nevada becomes an NCR frontier, and only one person (give or take a handful of associates) ever gets to see what really goes on in the ops center at the .38.
If NCR wins, Vegas stays operational. It's the only real urban/ecoomic center and the only draw in the territory, and the business and political interests back home have already built themselves into the machine. There's a possibility the power vacuum on the strip could lead to catastrophic feuding or collapse, but in the short run let's say the families chafe under the taxes, security probably isn't as effective or intimidating as it was under the Securitrons, and the Omertas become more of a problematic influence on the area without a strong central authority to unite the families and keep them in check. In general, though, arrangements remain the same.
If the independents win (assuming, as Black Isle/Bethesda like to do, that the protagonist wasn't trying to burn the world), things become shakier in the region, but the Securitrons still mostly keep order in the immediate vicinity of The Strip. Given that Caesar's forces are beaten-but-fuming somewhere on the other side of the river, The Courier wouldn't want to force an NCR pullout, and given that the Legion is still the biggest threat to the Republic and that the NCR is already heavily invested in the area, it's unlikely they'd just cut their losses and withdraw. They are, however, now free to channel far more of their resources into consolidating their position. With the Legion removed as an immediate threat, the Long 15 starts letting people through again and merchant traffic once again blossoms (if slowly and under heavy mercenary guard), helping counteract some degree of the instability brought about by the events at the Dam.
The vast majority of these events would go almost entirely unnoticed by anyone who lived further than a Boneyard's distance away from the strip unless they had a direct business interest in the area.