He has a good point, Piranha is one of those ever popular rubbish movies, and I think they suck, in 3D or out of 3D, but he can't really talk seeing as though he made a basically rubbish movie, and put a ton a sparkly technology on it, spent a crap load of money and then pawned it off as a "great movie"
sadly 3D is a gimmick, it doesn't make a movie good or bad, nor do I personally think it adds all that much to it, the real "great movies" will still be the ones that rely on good story telling, original ideas (Im looking at you cameron) and great acting, and not 3D, blood, or chicks, to succeed. So I say lets keep advancing technology, but if he seriously thinks its a "renaissance" of the industry....he probably needs to go find a new job