I was initially looking at the RX1R as a single portable camera I can take along on my weekly trips. Something smaller than my D800 or Phase/Arca kits. I run into so many opportunities where a camera would be great, but don't always want the hassles of lugging gear through NA/European/Asian customs.
The RX1R looked great, though I wanted a 50ish FL as well.
When the A7R popped up, I thought great. I and still do. BUT, I think these cameras will be best with their native lenses.
The complexity of sensor/lens/RAW converter and their intricate dependencies are only trending upwards. Add to this the unofficial "cooking" of RAWs in-camera before we even get our hands on them. All of this means that the image-chain is highly optimized for a specific platform.
I went through Leica on 4/3rds, Sonys etc. but it was always a pain. Even the gazillion $$$ Arca/IQ180/Rodie kit I have is a pain when it comes to this kind of seamless integration, and this is with Phase openly supporting such use on their platform via LCC's etc.
The beauty of the RX1/R is this closed loop and the luxury it affords the manufacturer to optimize the chain end-to-end.
So for me, if I go this route will be with the native Zeiss for Sony FE lenses, and at a stretch native lenses for FE announced by Sigma and Zeiss. If Zeiss can modify the ZM line and address some of the issues, it would be great. This would also mean software makers like Phase and Adobe can anticipate and invest in camera/lens profiles in a practical way, not to mention camera manufacturers can "cook" RAWs, right or wrong, more optimally.
To this end, looking at full-res samples of the Zeiss 55 and 35 FE lenses, the samples are quite impressive. I downloaded some RAWs and converted using the Sony converter into TIFF (dialled all the camera settings to "0"), then played with the files in C1. Look pretty awesome.
Besides 4K for a body and two lenses seems like a deal after some recent tech lens purchases