This is pretty old but I'm sure it hasn't been posted here before. I think the concept is pretty cool and has some truly cool implications for the future, when it's refined more and more. Especially in possible gaming platforms
As holograms are pure light it has always been perceived as impossible for us to do anything but put our hands through them, but not anymore!
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http://www.thesun.co.uk/sol/homepage/news/article80219.ece