I think the opening thread used the word immersion, but I don't see this as what the Wii is aiming for, frankly. (Yes I know what Nintendo say, but lets pretend marketing people's opinions don't actually matter, for once?).
That 1up interview with Itagaki recently pointed out that the Wii changes the relationship between input and output.. namely.. a lot more input for the same outputs. Now it could be that the FUN of videogames is tied to the idea of tiny button presses translating to sword swings, or it could be that games can be successfully transformed, not just in terms of controls, but conceptually from that button-means-thing-I-can-do mentality and into utterly different scenarios. I don't think we should be surprised by the number of mini-games, but I think that successful games for the Wii would be slow, and probably a lot of first-person game.
Assassin's Creed, sure, not possible on earlier consoles, but you know, not by a great deal. Fighting, climbing, moving, all done before, just not to that degree of complexity. I'm excited by it, but in the same way I was about the Prince of Persia.
I don't think the idea of 'innovations in gameplay' really applies either, they're looking to transform the business model of games by stripping back a lot of what actually makes up gameplay; complex button systems.
In short, we're going to see a lot of terrible crap before some true gems emerge. Where are my Nintendogs going for a Wii?
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Reactions to the Hulk Hogan picture are making me hate people.