That'd be too easy- being scared to make your character move faster in a horror game.
I'd prefer something like having it quite scary, with some down right jump out of your seat moments, and have the amount of enemies and stuff increase as your pulse races; so that you have to try and stay calm to get through the game, and any raise in your pulse will make it more frantic, and the more you panic, the harder it gets.
Yeah!! That's kinda what I was driving at, but sometimes I get things backwards, lol Your pulse would totally play into how the game plays though, like the sanity meter in ED. God... like the dog hallway in RE? W/a pulse meter the first time I went into the room my game would have exploded, lol But, like, ... if your pulse is faster, normally your adrenaline is pumping harder, so like, maybe your character could lift more, like boxes that are in the way or something. Like remember how long it took for Jill/Chris to slide Umbrella boxes around? If there were enemies present I could image the pulse meter reading your anxiety, and maybe you character would gain an adrenaline boost or something... I dunno, lol
Vitality Sensor will not support hardcore games. Iwata is using mindgames on you.
The only problem I see with it is it's like... ON your finger, or whatever... I use that finger when using wii-chuck controls, so like, if a game tried to employ it, like a survival horror title, I think it'd be a logistical nightmare trying to figure out how to control your character AND be wearing this block on your fingertip.