SonyAlphaRumors posted a rumor (which they're calling "almost certainly correct" and from their "top sources") of a lens with a built-in sensor. Apparently it would communicate with a smartphone or other similar device for control(?), but it can also be used on it's own. Apparently it's going to share the 1-inch 20MP sensor and lens from the RX100M II advanced compact. I have no idea how this thing will work, but it certainly looks like an amazing twist to me.