I guess it probably does differ depending on consultant, but I remember it being just like the booking in appointment with the midwife. Nearer the time I think the birth was discussed and things, but early on it was all very routine and mostly making lots of notes!
Make sure your consultant reads your notes every appointment. I saw a different Dr every time and one of them kept asking me about my IVF pregnacy and appeard confused when I pointed out she'd been born and I was there because I was expecting twins.
Although they all were very nice and very supportive.
You might get some slight scaremongering. Not trying to scare you myself, but my brief first meeting with the consultant didn't go very well as she just launched into a big list of how I would have to have a theatre delivery, continuous monitoring, lots of people around me, bright lights, noise, and I'd have to get used to it. Er, we'll see... Fortunately my midwife was much more 'ok, so that pissed you off, take it as a starting point, it's all negotiable/depends on the situation', but I wish i'd been prepared for it.