I don't believe this can be done. A screen cannot be invisible with the technology we have now...
Even if it is real, you can see that all the icons are white, I believe it will be working only on the menu screens and not when you are using an application.
What do you think of this pics. Is it real or fake psd. Many people are using this pics to their blogs and forums whenever there are talking about iPhone 5.
I think this picturises the rumors of upcoming iPhone 5. The Illuminnati.
Please share, if you really know about this or want to know.