And its push into VR—which Mr Zuckerberg sees as a stepping stone to augmented reality (AR), where information is superimposed on the real world—pits it against formidable rivals, too.
The ruling brings to an end a bitter culture tussle of the work Vitruvian Man showing a naked figure with outstretched arm superimposed on a circle and a square.
The final type is progressive relapsing multiple sclerosis or PRMS, which is also one constant attack but this time there are bouts superimposed during which the disability increases even faster.
One early experiment is by the retailer IKEA, which is working on an iPhone and iPad app that lets users point their phone and see what furniture looks like superimposed in a particular space.