Because this is totally the final model that everyone will use for anything like this.This is a demo. It's not supposed to look good.
What I'm saying is, in any case, if you're wearing that, people are going to be looking. And how you make something like that literally private would be beyond me, especially being so attention grabbing, including the light.
I have absolutely no idea what you're getting at. You come in here talking about it like it's complete and this is exactly what people will be using in the future and walking around with it. Jesus christ, this is called a demo for a reason.
Also the same technology could be implemented with something like glasses that have a screen on them or whatever, so it really is private. It's just more plausible that someone would use this sort of technology to control the interface rather than having it 'wired to their brain.'
What happens when Steve Jobs dies.
Because our current electronics have screens that only the user can see?