I do really have trouble making out pixels on my old iPhone 4. My gf's nexus 5 is really nice (although it probably has more to do with non-resolution aspects o

I do really have trouble making out pixels on my old iPhone 4. My gf's nexus 5 is really nice (although it probably has more to do with non-resolution aspects of the screen) but that's lower 400s range. The nexus 6 is basically 500 PPI, I just don't get that range or beyond which we'll surely see next year.