Interesting. When OLED screens age, or burn in, do they get yellow? That is, less blue? If they simply get darker, this means the red and green subpixels deteriorate as well, which means improving just the blue subpixels doesn't solve the problem.

I personally think the relative sizes of the subpixels already reflect how much they age. Larger ones are presumably larger because the dye ages more quickly, and larger pixels don't have to be as bright per area. So improving the blue dye would allow us to make the blue subpixels somewhat smaller and/or brighter. The current size difference is not very large though.