This past week there's been a small flurry of chatter on the internet about a rumored full-frame mirrorless camera that Sony will be rolling out. Whether it's still in development, or ready to put on the market this fall, is a matter of speculation.
The SonyAlpha Rumors website asserts that "one native E-mount [the Sony mount] FullFrame camera is coming for sure!"
Once such a camera body is available, owners of Leica m-mount lenses made by Leica, Voigtlander, and other manufacturers will have an alternative to the Leica full-frame digital body, which is priced in the stratosphere.
Read about E-mount lenses on full-frame bodies here.