That's encouraging. Personally, I believe that setting books should cater to new players/players new to the setting rather than players more experienced with the setting, and that the contents should not overwhelm the newbie. For the most part, players with experience in a setting don't need a new setting book—outside of setting-specific mechanics (races, classes, etc.) if any, they can run a campaign using any previous setting materials they have.
That's why I, as a Greyhawk fan, am not terrible concerned about WotC publishing a Greyhawk setting book—I've got tons of existing setting material to work with. Sure, I'd like some of the setting-specific spells, monsters and what not, but I'm in a far better place mechanically than fans of Eberron, Dark Sun, Dragonlance, Kara-Tur, Al Qadim, etc.