Resolution has little effect on 'shot noise' (The noise I was talking about). That's because when viewed at the same size, the noise averages out to be the same visual noise.

I believe that 'low light capabilities' are going to stagnate soon-ish simply because shot noise starts dominating sensor noise. The only real solution to shot noise is just more exposure. But aperture is generally maxed, and it seems unlikely to me that image stabilization can go much further.