Default Is it just me?

When I use my friends iPhones or any 720p phones they look very grainy to me. Is it just me or is it because I have gotten used to the QHD display on my G3? I used to think the iPhone screen size was when I use it it's like a toy, and I have a hard time navigating the screen 😮

Also whenever I use the S4 it definitely feels a little more grainy after you get used to the QHD panel. Is anyone else seeing those sideffects. I think my perception quality expectations is out of the roof now...makes me wonder how people claim that a iPhone PPI is more than enough 😏