I would venture to guess you played more than 900 hours, unless you play less than 3hr/week on average. I typically do 3 hours every Saturday morning before my wife gets up.
anyways.
PS3 is by far the most expensive, but so far I've only watched 4hr of movies, and played 20hr of games.
so $15.18/hr
for comparison
Wii, bought 3 extra Wiimote+nunchuck, 1 classic, 1 wireless sensor bar, 25 games.
~$0.82/hr
Considering all the games I've played for extended amounts of time my wife plays with me, you could drop that cost/hour even cheaper if you added per person.