VR experiences are smooth, but slightly grainy, with visible pixels no matter what phone you use. (pcmag.com)
We watched for visible pixels, how the screen rendered dark and light colors, and how wide the field of view appeared. (thewirecutter.com)
The «retina display» on the iPhone 4 definitely spoils the eyes; the clarity and smoothness of lettering on the device, and the lack of visible pixels within the letters, makes it difficult to accept some of the displays we're seeing now. (pcworld.com)