Ho'in ain't new to Fallout: New Vegas. Hell, boffing Nova in Moriarity's upstairs was one of the first things I did in Fallout 3. The ESRB certificate for the sequel shows Bethesda's upping the ante with hot-n-heavy man-on-machine action.
There is also an extended sequence suggesting (no depiction) sexual activity with a robot (e.g., "Fisto reporting for duty ... Please assume the position," "I suppose I should test you out ... Servos active!" and "Something wrong with someone if they got to fuck a machine.")
There's also sex with humans, drug use, killing, violence and all kinds of depravity. In other words, it's a game set in Vegas.