[nexuist]

This is assuming you are operating a computer and not any other kind of machine. It would be very easy to assign multiple actions to different click patterns. For example, while driving:

- Click once to skip to next song - Click twice to go back to previous song - Click thrice to pause

While using any kind of industrial machine:

- Click once to emergency stop

While doing anything that involves both hands:

- Click once to perform an auxiliary action

Being able to click without having to physically perform anything can significantly reduce reaction time. If this system can be made reliable, there are a ton of dangerous or complex jobs that can be simplified and made safer with this technology.

[nopriorarrests]

>there are a ton of dangerous or complex jobs that can be simplified and made safer with this technology.

Honestly, this is a good point. However, just to play a devils advocate, for emergency situations you don't need a real-time brain computer. You can just measure the adrenaline level or heartbeat rate (which is trivially easy with present tech) and on once it jumps, you shut down the whole machinery.

My point being, complicated brain link is not needed to send what is, essentially, a "SOS" signal.