He's the one guy at the top of the draft I have no clue on. I could see him being the next KG, Aldridge, or Bosh, maybe more of a Camby type, or quite possibly the next Brandan Wright/Tyrus Thomas/Anthony Randolph/Insert any one of 10+ super skinny freak athletes who have been busts. I think his offensive skills are a bit overrated by some, even though there is clearly some potential there. If you look back at that list of guys in College I don't think any of them had any less offensive potential than Davis.
Add the risk inherent in drafting this type of player with us having Biyombo and Thomas on the roster (both freakishly athletic shot blockers who are both offensively challenged, at least right now) and I don't really like his fit with the team. If he turns into a Wright/Thomas/Randolph it sets this franchise back a long time again (like the Morrison bust, etc.), and even if he is decent we already have Thomas and Biyombo.
I'd prefer Drummond and Barnes for this team. I might even prefer MKG. All three seem like safer bets, and all three have skill sets that fit into the "core" of this team better.
Having said all that, though, I could easily see him being by far the best player in this draft is he improves his size and/or offensive game.