It seems like we're going round and round in circles...
No one is suggesting that Trump has declared/decided what the final border agreement will be for Jerusalem.
Therefore technically there was NO change at all.
However Trump's speech was symbolic, showing Israel, PA and the world that borders aside the US recognizes Jerusalem as a part of Israel pre any negotiations.
Now as @yehuda57 and others have pointed out, Jerusalem is the conglomerate of East, West, Holy City, Temple Mount and more in which certain parts were clearly going to the Israel/PA. While others will keep being sticking points in every negotiations.