Moto G phone has had a good screen for its price, and the G4 Plus is no exception. In fact, its screen is fantastic and better than ones on some phones that cost a lot more.
For starters the resolution has been upped to Full HD, so it’s now pin-sharp. There are phones with higher resolutions out there, but I defy most people to notice the difference if the screen isn’t a few inches from your eyes. If you enjoy a bit of mobile VR, you might want a sharper panel, but for everyone else it’ll be absolutely fine.