A patent is not proof that Sony will actually mass produce these lenses. But it definitely shows that Sony is thinking about making them. I would be happy if Sony would produce an 800mm f/5.6 and you?
The Japanese shop Mapcamera published its ranking of the 10 best-selling cameras in March. I noticed Sony loosing a bit of ground the past months. We really need some new cameras like the Sony A7V, A7sIV and RX1rIII.