The RX series are brilliant ideas. Certainly not a new category, but Sony combines great sensor technology with very good optics and body design that is appealing and desirable. If I want good quality and pocketability, I would go for the RX-100/RX-100II; if I were rich, I wouldn't think twice buying an RX-1/RX-1R; if I were a serious enthusiast who demands great image quality and optical performance, I would get an RX-10. In fact, despite the high price, I think Sony will sell a lot of the RX-10s; the zoom range and constant f2.8 aperture of the lens on this camera is simply too good to resist. If I were not a lens slave, the RX10 would satisfy 99% of my photography needs and in the long run, saves me tons of money buying mediocre lenses that most people would buy for their low end cameras, like the 55-200mm f4-5.6.
But my desirable camera is the A7/A7r. The A7/A7r may not appeal to some, especially those who only want to use it with auto focus lenses. The auto focus lens selection is a bit limited at the moment, but the two prime Zeiss lenses are exceptionally good, though pricy. To a lens whore who has lenses in many mounts, the A7/A7r is like a wet dream. Like everyone else, I realize there are issues with ultra wide angle rangefinder manual focus lenses which exhibits colour shift and severe vignetting. It's totally a non-issue for me. I don't own any wide angle range finder lenses. The widest I have is the 40mm f1.4 Voitglander Nokton. Most of my lenses are in reflex mounts, like Canon FD, Minolta MC/MD, and of course EF mounts. The A7/A7r can use all of them through adapters; exactly what I am doing with my NEX-6, except now all the lenses will see the light as they were designed with no cropping.
Downtown Toronto - Sigmarit 30mm f2.8 @ f8 & Sony NEX-6. Click for larger.