I think Rob is correct in that there are more really great teams this year. In my opinion, you have Golden State, Cleveland, OKC, LAC, and the Spurs who could all in 3 championships in a row. I think you could also put Houston in that discussion although I am personally not a big believer in them, that is more personal bias than reality.
I think the case can be made that GS is better than last year when they won the championship. OKC is likely to be better than they ever have been with a better coach, a max player in Kanter who gives them another scoring option, and they have way more depth than usual. The Spurs didn't lose anyone of note (Splitter) and added Lamarcus, David West, Bojanovic, McCallum, and Kyle Anderson is much improved. And the Clips were one win away from the Finals and added a legitimate closer in Paul Pierce (the Clips main problem in recent years is that they have no one to take the last shot with Paul's size) and dramatically bolstered their bench with Stephenson, Josh Smith, and Wesley Johnson. Cleveland is obviously better with Richard Jefferson and Mo Williams and will have their health in a few months.
Each of those 5 teams would be the usual best team in the NBA in any given year IMO.