Yeah, at this point I'd be shocked if there *isn't* a Definitive Edition, based on Larian's history.
Though my perception is likely being shaped by the fact that I really want one, of course. Partially to tie up some of the loose ends in the story like Karlach's story ending with a whimper in a very unsatisfying way, and part of it just for the sake of improving some basic quality of life stuff. (there's a *reason* I'm playing the game with around 7 different UI mods, for instance). I genuinely love BG3, but there's parts of it that could absolutely use some polish.
I guess we'll find out some time next year, if history is any guide.