These (from Eyetop) might be useful for monitoring handheld and body attached lipstick cams, wireless cameras in live event situations, and reviewing footage during the day in sunlight. But please, not for entertainment (from MobileMag): In an image-oriented world, Eyetop allows multimedia to enter inaccessible places. No one had imagined before that video could be seen everywhere even in public places, in total confidentiality.

I'd be much more interested in fixed focal length cameras mounted fashionably on glasses, and I will end up building these exact glasses for a project sometime in the next 12 months. But I won't need to see what I'm shooting. That would be the point. I would know the frame, and would move accordingly. Same way as when shooting documentary-style, both eyes open, moving with the moment.