So basically...
The more stressed you are, the more juice you'll be able to squeeze from this controller?
It seems all the "cool" features related to this new controller only come out when you're stressed. If that's the case, then I'm not interested for so many reasons.
Not only that, but it worries me that the controller won't be accurate enough. I don't own a Wii and it's the first time I hear of this Vital thing, but I'm thinking of Mood rings right now. You know when you put it on and it changes color and it says, let's say, that you're angry but you're not? Or that you're gloomy but you're just relaxed? Yeah, there's that.
I kinda wanna see this controller just to verify how accurate can it get, but I wouldn't buy it for the reasons stated above.
I wish there would be a bonus for other moods other than Stress. Maybe you recover health faster when you're relaxed, or your character falls asleep when you're tired. I don't know, chances are they might add things like these to the controller. But for now, Stress doesn't cut it for me.