Thought to Text

My bud said imagine if sensors could monitor your vocal chords as you subconsciously intoned your thoughts - without saying anything out loud.  

Mineable data? They can actually detect what vocal chord patterns arise during the subconscious intonation of speech which takes place during the regular thinking of most people. 

So while you are thinking "I'm hungry - I wonder if I ought to grab a bite" - you also (most people, anyway) speak these words at a sub-audible level with detectable and decodable vocal chord movements.

The logical announcement for Mr. Musk must of Needs be that a means of translating thought to text has been identified.