On the men's side things are looking interesting. With Djokovic unable to play in various places and Nadal's body catching up to him we are now guaranteed to have a grand slam champion born after 1990 for the first time (correct me if I'm wrong). And also a new number 1.
Both Medvedev and Thiem are 90's vintage (they won the ’21 and '20 US Open respectively).
But I agree, things are getting very interesting. Thiem finally made the breakthrough for the generation after the Big 3 but following injury he's out of contention for now, and Zverev hasn't reached his potential and now has his own injury set back. With Djokovic and Nadal towards the end of their careers (though I expect more slams for both, with the former missing out due to well known reasons) and Federer with at most a farewell season to come, the time for the young guns to stop forward seems to finally have arrived.
Alcaraz and Sinner seem likely candidates for multiple slam wins, but then we could see another Stan Wawrinka situation where an established and talented player finally gets the right people around him and the belief, and racks up a few Slams. If Kyrgios maintains his focus and composure he could be one. Or it could be a free for all.
I'm rambling but again, I agree, it's an interesting time for sure.