On my computer screen, a jewel-encrusted bow points skyward, with an arrow pulled back and ready to fire. In the distance, I can see a bull’s-eye planted in front of a Himalayan landscape. Slowly I lower the bow until the arrow is fixed on the target. For a second, I overcompensate and the arrow points toward the ground. I catch my breath, pull the bow up, and then release. The arrow sails across the virtual terrain and lands with a small flash at the center of the bull’s-eye.
Here’s the catch: I’m not aiming that arrow with a joystick, or a keyboard, or a mouse. I’m aiming it with my mood.
