2 things:
1. Pretty sure a Rockets homer on this thread tried to tell us that the Rockets were the better "team." Having role players doesn't make you a well-rounded team, having team-work makes a team. The Rockets still play through Harden a large majority of the time, with some CP3 mixed in now. GSW can go through Steph, KD, Draymond or even Iggy off the bench, and everybody eats. That's not to mention even Klay took some Nene and Harden off the dribble, which isn't even his forte.
2. Iso-ball is going to be tested, as is D'Antoni this series. Reggie was calling it in the 2nd/3rd quarter... Harden was heavily used the whole game, went off for the first 3 quarters, but by the 4th he was missing layups and jumpshots and turning the ball over for what seemed like the first time all game. GSW was happy to throw 3 or 4 defenders at him (I remember Looney tons in the first half with much more Steph/KD in the 2nd half) and let Harden work for every point. By the 4th, that showed.
The best analogy I saw about the game was essentially "KD was climbing a mountain with comfortable running shoes on and no extra weight... Harden was climbing a mountain with a 50-lb. backpack while barefoot." That's the game I was watching.