Nothing but the cleansing of the temple of God...us.
God did it this way in order to show that the laying on of hands could also be a means of transferring (?) the gift of the Holy Ghost.
In Simon's case, it also showed that without repentance from sin, it would not be given.
The Spirit of God will not reside in a polluted temple.
Remission of sins comes first in all cases but Cornelius', the first Gentiles to receive Christ.
His reception of the Holy Spirit before baptism was an example to the Jews.
My point stands. Water baptism has nothing to do with receiving the Spirit.