A billion dollars to do the hand jive

Facebook to buy brain science start-up CTRL-labs

(Reuters) - Facebook Inc (FB.O) said on Monday it bought New York-based CTRL-labs, a start-up that is exploring ways for people to communicate with computers using brain signals, in a deal that CNBC said was valued at $1 billion.
Facebook Vice President of AR/VR Andrew Bosworth announced the deal in a Facebook post.
CTRL-labs will join Facebook Reality Labs team, Bosworth said, without giving any financial details.

Facebook said it intends to use the neural interface technology of CTRL-labs in developing a wristband that connects to other devices intuitively.
“The vision for this work is a wristband that lets people control their devices as a natural extension of movement,” Bosworth said.
“We hope to build this kind of technology, at scale, and get it into consumer products faster,” he added.

A standard extension of wrist movement is the accelerometer, more accurate than reading muscle nerve impulses. 

If I  were Facebook, I am looking for someone who has developed secure ID for the wrist device.  If Facebook has SecureID then Facebook can deploy bearer digital libras.