I will be stunned if he breaks down in tears.
I honestly do not think he is doing this for forgiveness. Apparently his reason for coming clean and admitting is the hope that his punishment will be reduced and he can compete again in triathlons.
So it could be that he is not seeking forgiveness and searching for sympathy - in the way that Marion Jones etc were. I don't think showing weakness is in his dna.
I would love it if he gave an honest answer on why he took drugs - something along the lines of wanting to be the best. Everyone knows cycling was saturated with drug use - and I don't think anyone believes you could win a Tour (back then) without being on drugs of some description.
So I don't think it will be the soft, mawkish interview that people are predicting. If it is, then I will be extremely disappointed, but I think it may be surprising.