From what I can tell this is Nikon's first entry into the "Budget Supertelephoto" segment, and not only that but they're breaking new ground for basic parameters of a first party lens (from anyone).
Even if the corners aren't great, if they can manage top level sharpness across most of the center then it'll be perfect for crop shooters.
The big question is whether or not the Tamron/Sigma 150-600 owners are totally satisfied with their purchases. For BIF first party AF is normally the only way to go, but maybe third parties are good enough now?
Is this the golden opportunity you've been waiting for or is this lens just late to the party?