That's really the key question to the whole thing. The combat is pretty much what one would expect. How much of the game is not about combat though.
My expectation is that the game will be combat heavy and you won't be able to avoid it. That's the trend with pretty much every game out there today, and Bethesda hasn't ever released a game that let you sneak your way through it. I'm not going to hate the game if that's the case, but I'll be a bit bummed.
If they can really capture the feel of the original, where you felt you could talk your way out of most bad situations, that would be phenomenal. I'm glad to see that the Vault experience looks like a fun non-combat episode, but I'm guessing it's a lot of run and gun after you leave the vault. I'd love to be proven wrong though.