Because with those numbers, for each percent of your life you spend playing with a Wii instead of a PS3 you save $1/year in electricity. "Save $30/year by play

Because with those numbers, for each percent of your life you spend playing with a Wii instead of a PS3 you save $1/year in electricity. "Save $30/year by playing Wii 8 hours a day every day!" -- might not get good traction as a sales pitch.