Guitar Hero III offers a person the fastest and most entertaining way to become a pathetic loser.
I should know.
Duck Hunt came close in the 1980s with its "sporting rifle" that looked like it should shoot lasers. It wasn't exactly the most entertaining, however, given the fact that most people learned to sit inches from the TV to increase their score. Games are quickly ruined when your eyes start to burn. But if as an 8-year-old you happened to slip into conversation that you enjoyed clay shooting, well, then it was fully successful in turning you into a tool box. To this day I'm still tempted to write "skeet shooting" when asked to list my hobbies/casual interests regardless of the fact that I've never actually held a gun that didn't have a cord.
The Power Pad was pretty great and "World Class Track Meet" filled the track star void for kids who say, skipped (not as in skipping, but as in faking a major illness) the mile-run every year for gym class. But one soon learns that people only care about track athletes once every four summers, so the Power Pad lost its cool. Dance Dance Revolution is a variation on its theme, but I'll argue that if you need a computer to tell you where to put your feet, you're not dancing. That'd be like saying you can spin records after playing a few rounds of Simon.
I never had the Power Glove, but I saw a kid wearing one on the train once and I thought that was basically awesome.
But back to the cold hard fact. Guitar Hero III puts every other game to shame. Christmas Day my cousin brought over all of his games to my grandma's house, and 9 hours later--really--the guitar had to be ripped from my hands. My little cousin Julia is amazing and during her perfect version of Metallica's One, she goes, "Grandma, aren't you proud that all of your grandchildren are so good at Guitar Hero?"
That single question might keep me from ever playing again.
But probably not.