He'll find a niche in REALLY creature heavy decks with Domri, but I don't see him being $30-40 per. He helps you ramp, but only if you already have creatures in play - isn't that one of the definitions of a win-more cards? I could see him being $15 - sort of like Jace, AOT at the moment, but not the major workhorse that some are expecting.
Don't get me wrong, I like him, but Garruk, Primal Hunter created more creature and card advantage and he didn't see much play, despite only costing one more mana.
The bigger question is, why did R/G get another walker so soon? He fits the color flavor, but it almost seems like there's a third one in store for the set or something...