I didn't mean to sound like I was rebutting your original point about the 1/1.2" sensor -- Sorry about that.
I was just adding to the point about 1" sensors actually being as good as an SLR sensor, which they are.
Of course the RX100's optics limit some of its performance, but Sony's 1" sensor and the M43 sensor they sell to Olympus punch well above their weight, equalling or besting some existing APS sensors on the market today.
What a lot of people forget is that doubling sensor size gets you only one stop in high ISO performance. For raw quality in decent light, 1" seems to be a sweet spot.
I was just adding to the point about 1" sensors actually being as good as an SLR sensor, which they are.
Of course the RX100's optics limit some of its performance, but Sony's 1" sensor and the M43 sensor they sell to Olympus punch well above their weight, equalling or besting some existing APS sensors on the market today.