I can see POB as a solid situational backup PF/C someday; definately a fourth big, maybe a third.
Is he fast or strong enough to stay with Amare, Bosh, Shaq or Yao? No, but not many players are - that is why those guys are stars.
Is he fast or strong enough to stay with Joe Smith, Troy Murphy, David Lee or Al Hortford? Time will tell, but it is a reasonable expectaion that he will be.
The guy stinks right now, but lets not sleep on his athletiscism or jump shot. Both are above average.