Upload & Sell: Off
I'd certainly like a 21, or a 70mm (50mm is too close to 35mm I and I don't think they'd get many additional sales from RX1 owners)
Problem is though, while buying 2 or 3 Sigma Merrill's is pretty easy to rationalize, those are $800 cameras, instead of $2800 cameras.
I just couldn't really ever see myself wanting to carry 2 or 3 RX's around. Not only would it be close to $9000, but while the smallest FF around, it would still get a bit heavy, and rather defeat any weight savings. Probably lighter to carry a couple lenses instead.
Additionally, while I do like wide angle, how useful is say a 21 or even a 24mm daily ? I do own wides, but I use them for only specific shots and they really don't work too well for general snapshots etc.
Would anyone want to go out with just a 21mm RX style camera ? Be pretty limited for $2800
Likewise, 75 or 85mm, again, great focal length, but a bit limited in what you can shoot other than short portraits and such. Couldn't imagine going away on a weekend trip and wanting to take just a small light camera and being stuck with something so tight. Especially for $2800 again.
Could maybe do a 21 and 75, or 24 and 50 or whatever, but I think carrying 2 bodies rather defeats part of the point of the RX style camera.
Its about having something really minimal, just a single focal length with great IQ. No need for camera bags, lots of weight etc. Just something you can carry around all day, not get tired and still get get images from.