Read all about it here: https://web.dev/content-visibility/
2 great advantages: faster rendering speeds since it'll only rende what's needed and a much greater user experience for heavy/big pages.
Can see this being a great leap forward and away from various 'ugly' hacks known and widespread used still today that kinda try to achieve the same goal.
Any thoughts on this? It's been while since i've been this enthousiastic about some new innovations in web development..