Yeppers. As the linked interview notes, Dark Sun has much more distinctive flavor than a lot of the other settings WotC could have revived. It sounds like a considerable number of crunchy bits will be distinctive to this book as well.
Plenty of other D&D tidbits have been announced, including one that caught my eye: D&D Heroscape for a February release. We’ll bring you more on that one when we can. Also a Ravenloft board game for next Gen Con – it’s a bit curious that WotC didn’t start doing board games based on D&D-related properties sooner.