I'm not so sure. Just for reference, https://youtu.be/D5esyZPt5Jo?t=16m24s.
I think that's just the regular Las Vegas sign (hard to tell if it says Las or New, but that's definitely Vegas), and there's no sign of the Lucky 38 - just looks like the Space Needle next to the Las Vegas sign. And the title screen states "Copyright 2071 Planned Diversion" (pun on Activision?), so it couldn't have said New Vegas.
It is a nice reference to New Vegas, though. You'd think that if Bethesda held a grudge against Obsidian for any reason (they totally don't, but some people believe) they wouldn't have included Las Vegas in a mini-game for people to draw connections to.