When I was younger I used to read magazines like Scientific American, and sit in breathless wonder and anticipation of all those wonderful things which were Just About To Come.
As the years passed though, I realized that none of those things I'd read about ten-fifteen years earlier had arrived yet! So my interest fell.
So, while I like the site dVice for pointing to new things, I think it's slightly irresponsible reporting to write a thing like: "All those 3DTVs and virtual reality goggles are soon to be rendered obsolete by contact lenses with built-in LED arrays that can display images on top of your retina..."
This sounds like it's coming within three or four years at most. But to my best judgement, technology like they describe here is probably thirty years away if that. And even if/when they can get the components small enough, I can't get my head around how they will manage to get the image in focus when the display is actually sitting on your eyeball. The eye has to focus on an object for it to be in focus, or some other kind of lens has to focus the light on the retina.