While I agree the possibilities are terrifying I have a rather hard time imagining this type of interface becoming ubiquitous. I just don't think most people have enough mental self control to avoid accidental input. For example how many times have most of us, in a moment of anger, thought about saying or texting someone something that we'd never actually send? How would such a device determine between what you actually want to input and what's just passing thoughts?

I also have hard time seeing the "normals" feel comfortable with this kind of tech for everyday use.