I think he's right, the PS3 is the best platform for the game. But not for the reasons he stated. I think the main factor in making the PS3 the best choice in terms of technology is the blu-ray.
Heavy Rain has a shitload of assets and if Heavy Rain had been on the 360, I think they would either have changed the game to make it fit on several discs (which would have limited the game's main mechanic) or they would have limited their scope so the game would fit on one disc.
Disc wise, it probably could have been on one disc on the Wii, but then the whole realism-aspect would kind of have been lost.
Secondly, I think the PS3 userbase is also the most likely userbase to pick up on such a game, when you look at the demographics. Just like Disney and Warren Spector decided that Epic Mickey was best suited to the audience on the Wii, so does Heavy Rain best suit the PS3 audience.
In my opinion.







