Isn't this basic marketing? Know your market and give them what they want. For the purposes of this discussion I'm assuming hardcore means a combination of M rated (and some T rated) games, and any game that requires a decent amount of controller co-ordintation.
The question for the GAFfers is: would they (who don't have a Wii) buy a Wii if it had more "hardcore" games on it? Answer is probably that they get enough hardcore content from their PS3/360/PC so probably wouldn't buy a Wii to play the hardcore games that are only available on Wii.
Seems to me the market isn't big enough for 4 consoles to play in the hardcore gaming market.
Nintendo aren't massively competing for the attention of the hardcore gamer demographic. Seems they recognised right from the beginning that they would not outgun PS360 in that arena. Why 3rd parties are not learning from Nintendo's software strategy is the only real head scratcher in this.
Having said that there is a hardcore niche dedicated to the Wii, and those folks deserve to continue to receive a steady flow (albeit probably not a flood) of hardcore content. But the gold on the Wii is in the casual demographic.
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