I've seen some of the videos for ED, and what's jumping out at me is that the game changes based on what your character experiences. In that scenario, it's awesome, because you have full control over it, well, to some extent.
Basing it off of pulse rate would be difficult for gamers to control. To talk about the erratic heart rates I mentioned earlier, it's not a joke. It cannot be simply "baselined" and differentiated because of several key ideas which all spawn from the inherent fact that it must record beats per MINUTE.
"Why", you might ask? Check your pulse for a full minute. Pulse changes erratically based on things like air quality, breathing speed, sitting position, and more. What about smokers or people drinking caffeine? The game will change simply because you had a soda, or even based on the time of day. Even while in the same position, the heart does not beat at a steady pace, it jumps, and does other things because of biological processes. Then on top of that, you are goig to be waving a wiimote around, further affecting your heart rate. It just doesn't seem very plausible.
I do think there will be some games for it, and I can now think of some that might use it, but as far as fun factor, I don't see it changing much.
