Are you serious? Of course V.A.T.Sis going to be in New Vegas! Why would they take out such an important gameplay mechanic? All they are doing is making melee weapons better in V.A.T.S. and making the FPS more accessible. They didn't show any V.A.T.S. gameplay in the latest trailer, but that's probably just because they wanted to showcase a lot of the new stuff within the time limit.