I am by no means an expert here…
But stylistiacally the biggest changes to have happned in total are that the whole order of play is very different to how it was before AI even came about. I dont really think that AI has mastered the game. I think that there is still much to learn about the game. The biggest changed have been in joseki, and indeed the way in which the game is being played, priorities have changed.
The biggest thigns we are gonna see from here on out are likely going to be more of the same of what we have had already. More joseki, and even longer ones. the machines do not care that we cannot read forty plus moves for forty plus variations… thats how they play, its not how we play. Especially the average amature player.
We very much get fed the drips and drabs of “New” moves, and hope for the best when we play them, because we dont have the same abilities that an AI has.
Though i do think it would be intersting to see AI play on larger boards, see what they make of them… and even train an AI to play on larger boards, and then make them play on the standard 19X board. See what happens.
But yeah, anything new is going to be more of the same, a new sequence here and there, and perhaps more change of style, but its really hard to predict.