Honestly, I am a Wii/PC gamer and I think that between the two, there is not too much I am missing out on.
However, when a console like Wii is released, there is a lot of hit/miss potential to the console. Not the games, the console. Some people will love the different styles and pace of games brought to the table while other gamers may simply desire something different. While I desire both ways to play, I despise dual analog so picking up Wii over thee other two was essentially a no-brainer. And since I can still use a traditional controller on PC and Wii, I feel like my bases are covered from top to bottom.
For you, I would recommend playing the system a couple times elsewhere prior to making a purchase. While it may seem like a good purchase to you on paper (or not a good purchase), you may try the thing out and decide to go in thee opposite direction.
I do agree that every console, at this point into the generation, has games that can justify the purchase, so I also recommend you look into future releases and see if there is enough on the horizon that creats a spark in your interest. If you buy the console today and decide that there is nothing for you in the future, you may still regret the decision later.
Good luck!
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