It's incredible that Alcaraz won this game, and it's also important that he won after losing the first set. Beating a legend like Djokovic in the final is a huge achievement. It looks like we're going to talk more about this kid now.
Djokovic will win a few more titles before ending his career. However, after he retires, tennis will be left to these young talents. A great achievement indeed, congratulations again.
Of course, a period will end and Djokovic is getting there but I'm sure it will not happen in the near future, 2-3 years he will still be able to play at his highest level, and the biggest capital he has is his fitness which doesn't show that he has an age gap away from the young players.
Apart from the 30-year generation, only two players have so far managed to beat Djokovic in the Grand Slam finals Daniil Medvedev and Carlos Alcaraz and this is proof that he is still the best because other young players have no way of bringing down the Serb.
The next Grand Slam is the US Open, don't know if Djokovic will get a visa to enter the United States, if he can't compete there then Alcaraz will certainly be quite easy to defend his title there, Daniil Medvedev will definitely be the strongest competitor there because he really loves hard courts, but it looks like for now only injuries can hinder Alcaraz.