Totally. I kind of want to start every comment on every thread on HN with "Glass is not an augmented reality device."

I've worn one (very briefly) now, and let me be very clear: you can not superimpose labels or images on anything you see in daily life with Glass. This is a physical limitation of the hardware, and it is absolute. This hardware will never, ever, ever be able to do that.

And it's unclear to me if the hardware for Rainbows End/Halting State augmented reality will ever (or at least in this generation) exist if Glass-like heads-up-display hardware can not be successful in its own right.