I think Skyrim had a far more negative impact on rpgs than BG3 ever would. Dragon Age Inquisition in particular was pressured by EA to play more like Skyrim. Which I think negatively impacted the game.
With BG3 I see it leading to more turn based and strategic rpgs being greenlit. As well as more tabletop centric rpgs. It could very well reverse the trend of the last decade of rpg just being something slapped ontop of another genre like FPS altogether.