Guitar Hero is innovative?
Guitar Hero is a game?
Please, state your reasons.
As for Guitar Hero missing the mark, there are many reasons, but for now, the primary one will do.
From the consumer point of view:
Only Nintendo offer a control scheme whereby you have to buy two separate items just to have a complete controller. That's right, the 'Mote and the 'Chuck. Now, lots of Wii owners have done this, and have done it several times so that more than one person can play at the same time.
Now, in order to play Nintendo's next big thing, Guitar Hero, guess what? That's right, you have to buy some more peripherals.
Not only do you have to buy it, but you have to put it somewhere.
How do several people enjoy Guitar Hero? Do you take it in turns to jump on the guitar?
Also, what do you do with it once you are bored of Guitar Hero? It's not like you can use it for anything else. What do you do with your investment?
From the retailer point of view:
Anyone that works in retail knows that space for stock is a concern. Anyone that knows Japanese game retailers knows that the vast majority of them are small shops.
For the space one unit of Guitar Hero takes you could stock about 20 standard sized games.
Now, game retailers aren't doing it for charity. The profit on one unit of Guitar Hero isn't going to be much different from the profit on one unit of, say, Mario Galaxy. Now, given the choice between selling 20 copies of Mario Galaxy, and 1 unit of Guitar Hero, which do you think they are going to opt for?