So the first images of this concept leaked a few weeks ago but now more information is emerging.
The idea is simple, Sony will build a complete camera into a lens (not actually that hard to do) and the it will wirelessly connect to your phone using it as the viewfinder. The result should be a far better lens than you could pack into a thin phone.
The biggest plus of course being the ability to do real optical zoom but also you’ll benefit a lot from larger sensor size.
The idea is to do a range of these lenses. With the Lens G (pictured) being at the low end with an F/3.3-5.9 lens with a 10x zoom and a 1/2.3″ 18 mp CMOS sensor.