G'lord, sony is just cranking out those bodies.
Wikipedia shows that A7/A7R was announced in Oct 2013. So in ~20 months, Sony announced A7, A7R, A7S, A7II, and A7RII.
Really curious as to what their strategy is with so many bodies released in such a short time span.
I prefer to think of it as two generations of bodies, with three sensor options for each one.
Better this way than to go with the Canon approach and only offer one, middle-of-the-road sensor that satisfies neither the high-IS, low-light action shooters nor the megapixel-hungry landscape and architecture shooters.