Well, the Itachi-fangirls are all happy now, but I am a bit more sceptical. After all, we have nothing but Tobi/Madara's word for it - and it is even possible that in the next chapter he will say: "Just kidding."
Well, Tobi/Madara is not really a trustworthy guy.
I hope that Tobi/Madara will come up with a really good explanation though. I feel a bit betrayed - as if I cannot trust my own judgement any more.
Sasuke will be happy now that it was not him who killed his brother but that Itachi broke down by himself.