I'm sure it will be a lovely setting, but honestly, I don't see myself using it or buying it. I'm a World of Greyhawk guy from way back. Before I picked up another setting, I'd want to use some of the ones I have that are unused. Maybe Westeros from A Game of Thrones next, I dunno, Eberron, or Ravenloft. Scarred Lands, Uresia: Grave of Heaven. The world of Warcraft, maybe. Diamond Throne (from Arcana Unearthed and Arcana Evolved.) Hell, even Spelljammer or Planescape. I've got a couple of Arthurian campaign books that would also be a lot of fun to try.
I just can't imagine what would push me to purchase one more fantasy world setting.