Portable monitors don’t have any inherent advantages for gaming. Many are built with lower-quality display panels and have low refresh rates. Many I’ve tested suffer from some ghosting, which doesn’t impact day-to-day use heavily but negatively affects gaming. Low refresh rates also keep games from looking as smooth. That said, plenty of portable monitors have special gaming optimizations. You can find models with fast 120Hz and higher refresh rates, and some even offer OLED panels, which exhibit almost no ghosting. That said, most portable monitors are larger than the screens on mobile gaming