Could be a great idea now. Relax your mind to win the game or somethingVitality Sensor is still in my mind the most bizarre thing they ever teased.
Also kind of interesting that ZCam (more specifically Z-Sense) ended up being used in the Kinect.
For released yet ultra-obscure GBC/GBA peripherals you should check Shonumi's (GBE+ author) Edge of Emulation articles in his blog.
Shonumi: Main Page
shonumi.github.io
Like the mighty POCKET SONAR!
Like the mighty POCKET SONAR!