Many people I know in the comic café we go play D&D are not really interested in D&D and the Faerun worlds per se. I mean, they like to create Capitan America, furry or that kind of characters. They go there to Roleplay, they are not interested in game mechanics, min-maxing or number-crushing; They pick their characters using the "Rule of cool" (They pick 5e rangers voluntarily, do I really have to say more) so I am not sure if they will buy into a videogame.
he videogames are more combat-centered.
That said BG3 will be a MP game, so that will attract many people. There are plenty of people playing NWN persistent world right now. And plenty of people will get a game with D&D in it. It is not easy to find groups to play: they disband or have different schedules. You can play a videogame when it suits you.
There have been hints that BG 3 is not completely combat centric as one might think. Larian has mentioned there is not much combat at first.
And I agree about Multi-player options attracting folks, not just that, but ones linked to Stadia's new capabilities.
