For my opinion, sufficient or insufficient power doesn't really matter

player who select console is because of the variety application are all customize to be play and enjoy the optimal performance without worrying the requirement of the games

hardcore fps player are more dependent on pc processing power due to the high expectation of graphical detail to be displayed

so as for conclusion,
if really going for fps, than PC is the choice and easy game control

adventure, action-rpg or so on, console is the choice,