If you've grown up playing video games for about 10 years at least you've probably played 50 WWII games, 30 Sim-type games, 25 Pokemon games, 23 Mega Man games and 34 Mario games. I enjoy storming the beaches of or playing every sport known to man with Mario and friends, as much as the next guy, but after awhile it gets bland and you need something new.

Innovations, keeping things fresh in the game is one of the most important factors in making a game. You can make the coolest WWII game ever with sweet graphics and explosion effects but it's been done before and chances are some people won't even check it out if the game brings nothing new to the large WWII franchise of games. You can make Mario Badminton but if it's like Mario Tennis it's not going to attract many players.

Nintendo has  always strived to be innovative in their games from the motion control Wii to the touch screen of the Nintendo DS and sure enough Nintendo dominates the sales charts by bringing something new to the table and not just extra buttons on a controller. Nintendo was the first to add the Rumble Pack and now rumble features are built into every controller because it adds that much more depth and innovation to the game.  

Innovation is important to keep the interest of the players and isn't just another mindless shooter or adventure run-around game. Let's see something new in Barbie Horse Adventure 3, who knows, more than 1 person might play it.