As I expected the trailer didn't tell me anything useful or meaningful. It's a movie trailer, which makes sense as BG3 is more a movie than a video game. Just lots of pointless cinematic fluff.
Technically, the EA was certainly an awful lot more game than say The Witcher 2/3 ever was -- even two years ago when I finished it. You could of course argue that's not a particularly high bar. The Witcher outside of combat is a "glorified cutscene" through and through (even most linear quests solve themselves through witcher sensing), whereas BG3 's style of presentation is more in line with the likes of Kotor or the first Dragon Age: "Cinematic dialogue" and a few cutscenes -- but everything else still being "game", actual dialogue options included.
And mind you, I'm tired of this trend of so many games mimicing movies myself, which is why I'd at least once see hundreds of people being dedicated to interactions, role-playing, improvisation, world simulation depth and quest design, as opposed to a good chunk of those people animating ever more complex 3d characterss so that they look movie-like during any sequence they speech and any action they engage in. Don't think that's gonna happen overly much though anytime soon, as "cinematic" games have proven to be successful -- they're mimicing popular cinema in doing so, after all. And big projects are risky. To make your game look just like the movies everybody likes so much is kind of a safety net to fall back upon in a sense. "WOAH! Baldur's Gate 3! And it even kinda looks like LOTR!"
In 50, 60, 70 years from now a lot of cinematic games may be seen like the early movies though, which too mimiced stage plays and theatre before developing mass market story telling languages of their own. (That's not a dig at cinematic games wholesale, of which I like quite a few. Rather the ever-presence of the holy cinematic dialogue / cutscene as storytelling device). The only reasons a lot of indies or Kickstarters aren't doing it are purely budget concerns. And if they do it (Solasta) -- the results can't compete with the big dogs and they are being criticized for it due to their naturally inferior character models and animations.
You nailed everything here. Comparing incomparable is an utterly stupid trend nowadays, that's why during the BG3 trailer showcase at game awards the whole chat was spamming some retarded nonsense like "skyrim is better" and "worse elden ring" lol
The Witcher outside of combat is a "glorified cutscene" through and through (even most linear quests solve themselves through witcher sensing), whereas BG3 's style of presentation is more in line with the likes of Kotor or the first Dragon Age: "Cinematic dialogue" and a few cutscenes -- but everything else still being "game", actual dialogue options included. 
Don't think that's gonna happen overly much though anytime soon, as "cinematic" games have proven to be successful -- they're mimicing popular cinema in doing so, after all. And big projects are risky. To make your game look just like the movies everybody likes so much is kind of a safety net to fall back upon in a sense. "WOAH! Baldur's Gate 3! And it even kinda looks like LOTR!"
