Watch the trailer again. Routh's got a chest on him.
Plus...what is Superman supposed to look like? Massive Christopher Reeves? Barrel-chested George Reeve? Underwear model Tom Welling (the guy I thought should have been in the movie, but...).
All Supeman's gotta be is tall, dark, and handsome. (Not quite as dark and handsome as you, my good Doctor) After that, it's a crapshoot.)
And, I'll agree that CR was a great Superman--the sheer mind-blowing confidence he had when he put on the suit was enough to sell the character--but themovies themselves don't hold up like they should.