The Game of "Lights" in air : Futuristic Displays ! ( Not talking about Hologram ! )

You might have seen projections displayed in air, maybe in Sci-Fi movies like "IRON MAN 2", 
(specifically that scene of discovering new element for core of arc reactor)
Nowadays we see so many different types of display systems...
LED display, LCD, OLED, Holographic etc.
In most of the sci-fi movies we see lights thrown in air and creating different interacting representations, i'm not talking about hologram because it requires a obstacle (platform) for a light to fall on. (like glasses or plastic cause hologram works on concept of diffraction of light.)

Here is the point. we need a platform in air which will stop Specific light rays in air for sometime. can we convert air to a appropriately hard display screen !?
I had this idea, so i went on basic research work, surfed through the internet then i found few tech communities who already have developed few ways of representing lightning structures in air, but what i found in this technique was they were using high power lasers to ionize gas in the air and in this way gas used to emit some charges and as a result lightning effect occurs. different level of ionization gives different colour of light. (but preferably they keeps only one colour light.) but it is harmful for any normal person to go towards those projections because of high power lasers. and we are looking for interacting display systems in air. which should react accordingly as we touch to its particular parts.
By now you might be thinking, why do we actually need such display system,
reasons are : 

• we can carry small devices with us and can display smaller to larger representations with lights in air.
• Cost can be somewhat lower i guess because all we need is compact device which contains light emitting device and source providing system.
• Easy to carry anywhere.
• For more reasons i must say you should see sci-fi movies, for reference watch "Iron Man's movies".

Now lets talk about what all Possibilities are

we need to make some type of material which will be lighter in weight and can be thrown in air (they will fly like a drone as they are very small and lighter and will contain propeller and light emitting small devices.) and they will self align themselves in such a way that whatever light they will throw in air should fall on each others light causing a surface of different lights incidence.

but later on i found that this technique is also have developed somewhere. but its at a very small range and requires a lot complex pre-requisites. Then there comes interacting part how those devices will understand that the lightning surface has been touched. This is the important question, if we figure out this we will be very close to the revolutionize the display technology !

Now this problem of interacting part, i keep it for you all to think, probably someone (or me) in future will find this solution.....

What do you think about this let me know in the comments below...

Till then stay tuned, stay happy, stay fit !

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