The japanese blog Egami (Click here) keeps looking for new patents and found that weird Olympus stereo idea. The second stereo lens gets attached on the hot shoe and works together with the “normal” m43 lens to create a stereoscopic image. I am not aware of the advantage such an idea can give to you. The only thing that comes to my mind is that you can sue any m43 lens to create a 3D image.
And Panasonic published a patent which describes a Liquid Lens (Click here). Also Olympus filed such a patent a few months ago.
Reminder: These are the advantages of liquid lenses: -non-movement glasses for zoom or AF
-less glasses inside the lens
-faster electrical response
-non-motor on the glass
-silence AF mode