It is simply not true that noise increases as pixel size increases. The exact opposite is widely known to be true. See this page, for example: http://firmitas.org/Sensor.html
Photon shot noise increases like the square root of the area of the pixel, but the signal will increase like the area.
In that case, the important quantity ( Signal/Noise ) improves like the square root of the area of each pixel.
If readout isn't shot-noise limited, then the payoff for a larger sensor could be as large as the ratio of the areas between old and new.
So, since the heatigng up in turn depends largely on current running through the sensor: how does that scale with larger/smaller pixels?
> In addition, the sensor's pixels and readout circuitry employ new technologies that reduce noise, which tends to increase as pixel size increases.
The linked page is pretty sketchy, it mentions lenses but not optics. Optical resolution will be limited regardless of whether the lenses are perfectly polished. It's hardly irrelevant too, with modern optical resolution close to sensor resolution. The article makes assertions but no citations or measurements. Worthless junk.
Also, they're describing a 35mm sensor. This thing will work with existing 35mm film optics, and (apart from physical properties) that's a big part of why the sensor size is interesting.
Would be nice if there were more technical details, but I guess that's press releases for you.