A new camera in 2013, what will it be?

I only trust DXOMark for sensor evaluations. Note that I did not say high ISO was better on the 24mp sensor, I said it performs as well. Check the sensitivity graphs for the Sony NEX5-N vs. NEX 7. The graphs are right on top of one another.

http://www.dxomark.com/index.php/Cameras/Compare-Camera-Sensors/Compare-cameras-side-by-side/(appareil1)/736%7C0/(brand)/Sony/(appareil2)/737%7C0/(brand2)/Sony

Are smaller pixels somehow worse? Not necessarily. Just because the diffraction limit has been reached (with large pixels) does not necessarily mean an image is any worse than if smaller pixels had been used (and the limit was surpassed); both scenarios still have the same total resolution (even though the smaller pixels produce a larger file). However, the camera with the smaller pixels will render the photo with fewer artifacts (such as color moiré and aliasing).

http://www.cambridgeincolour.com/tutorials/diffraction-photography.htm

I believe the explanation is that the lens can act as an AA filter with extremely high resolution bodies.

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Dan