BG3 will be remembered as a DnD game.
Because it's prominently featuring DnD mechanics.
Will it impact Larian and CRPG's in general? No.
Larian is already reknown for its Divinity titles, which weren't DnD games. Heck, it's this reknown that helped sell BG3 in the first place. People knew how good Divinity was so they were hyped at their attempt with a equally noteworthy IP.