[niklasrde]

That's what people said even after the original iPhone was announced. I think there's a famous interview with the RIM boss who basically said "energy requirements make this design impossible" in 2007, and yet, it actually came out and worked a few months later.

[layer8]

I don’t think the current situation is comparable. You’d need more than an order of magnitude improvement in battery tech. Glasses would have to be less than 50g in total (and that’s on the high side; the sunglasses I happen to own weigh just 14g). Judging from its dimensions, the VP battery pack alone will probably weigh half a pound, and it only lasts two hours. In addition, we have no idea how to implement the required optics for 3D vision in the form factor of reading glasses, and we also have no good idea how to implement display panels that support both transparency and opacity, let alone how to achieve that in combination with those optics.

Of course, miraculous advances can occur, but you can’t just expect them to happen.