[Lingster]

I doubt that practical myostatin blockers would have their most dramatic effect on elite bodybuilders – for the most part such people already have low myostatin levels as part of their genetic "gift".  Where you'd see real change is in the frequency of muscular women in society.  Lots of people (men and women) would like to have bodybuilder-sized muscles without putting in the time and attention to diet that's required.  Practical myostatin blockers would make it possible for average people to develop much more muscular physiques.  (It would also likely shorten their lifespans.)