That just sounds like a made up excuse. The pentile is literally smaller than a biological eye can can physically see at normal viewing distance. Your eye simply does not have the visual acuity to make it out.
You're going cross eyed because you're trying to force your brain to focus on something thats not there.
I held the SGS3 and htc EVO 4G lte side by side and the EVO was smoother/clearer. The SGS3 looked like every pixel had a halo effect.