If you know anything about Microsoft Surface than this will probably peek your interest. Things like this may just be eye candy for now, but you can see in just a matter of years (or less) the way we interact with computers in our daily lives will be drastically different.
I don’t mean the way we all normally use computers, but how we do everything else. Look at the way people are using phones now. They play games, text around the world, get driving directions, take videos and pictures, listen to music and a whole host of other things we never though of 5 years ago. If you went back to just the year 2000 and told everyone what phones would be like today most would never believe you.
That’s where Surface and technologies like it are taking us. When you’re out and about you’ll be interacting with display technology like this every where. Whether it’s ordering off a menu at a restaurant, getting plane tickets, adjusting your hotel amenities and upgrading your rental car all during your layover at the airport, finding where stores are and what sales they have at a mall display, etc information will be much richer and more interactive than we have now.
OK, get the point. 
SecondLight is a technology where a second image is literally projected through the first. It isn’t visible until a translucent item is placed in front of it. This could be something as simple as a sheet of tracing paper.
that isn’t so special in itself, this easily could have been simulated with the older Surface technology. It’s the fact that this second image is projected that really beefs things up. Suddenly displays are becoming more "3D". Not in the traditional sense but you can hold the paper above the surface for an easier view. They showed some plexiglass "disks" that were molded with a prism inside. This allowed the light to bend and display the image on the side. It’s all simply amazing.
Check out this article and watch the video. It’s just mind blowing.
http://www.pcpro.co.uk/news/233511/secondlight-surface-on-steroids.html
As I always say, this is an amazing time to be alive.
Take care all!