Yippee kai yay!!!
Git along, little doggies.
I think the lack of actual revenue from the RMAH coupled with the tremendous feedback from console gamers about "aahhh, this is how D3 was supposed to be" sorta made this a slam dunk.
I mean, the Console's been out how long before they made this announcement? Not very long at all.
The data had to be overwhelmingly in this direction for Blizz to close the AH for good considering not only how much work they put into it, but how they delayed the launch, then delayed the AH, then pushed back against the tremendous backlash they received.
I love this decision. But man alive, when looking at the data, it musta been one of those "cats and dogs agree, even zombies and brains agree..."