I don't know why there's so much confusion with John Hurt. I'm positive he is not/will not be the 12th doctor. My girlfriend asked me the same thing after the last episode and I am a little surprised how many people jumped to the same assumption.
He is a past incarnation who, because of certain unmentioned notorious deeds, was not "worthy" of the title of "the Doctor". This was stated overtly in the last episode. Personally, I think it has something to do with the Time War but that's just speculation.
If he was the 12th doctor it would go against some age-old Whoniverse lore - like the suggestion that he gets younger with each regeneration.
Anywho, to answer the OP's question: I'm ready for a new incarnation. Matt Smith has had a good run although my heart still lies with David Tennant's 10th. Matt was a suitable replacement but I think it's time to move on. The last season lost some of the magic for me (Not Smith's fault of course). So I'm eager for them to switch it up and maybe rediscover what makes Who great.