For I say unto you, I will not any more eat thereof, until it be fulfilled in the kingdom of God.
Note 3 at Lu 22:16: The Passover meal commemorated the Jews' deliverance from slavery in Egypt (Ex 13:3-10). It also had a much deeper spiritual application that, as Jesus explained here, would be fulfilled through His death. The Jewish nation as a whole had missed any future prophetic meaning of the Passover.
On the night of the original Passover, the Lord passed through the land of Egypt and judged the land by slaying all the firstborn of man and beast (Ex 11:5). The Jews had to slay a spotless lamb (Ex 12:5) and take its blood and apply it to the doorposts of their homes (Ex 12:7). They were commanded to remain indoors, under the covering of this blood (Ex 12:22), until the morning.
When the Lord passed through the land at midnight (Ex 12:29) to execute His judgment, He passed over the homes of those who had applied the lamb's blood to their doors, and no one was hurt (Ex 12:13). This is a perfect picture of the redemption that Jesus has provided for us.
All of us deserve judgment because of our sins (Ro 3:23 and 6:23). However, Jesus provided Himself as a spotless, sacrificial Lamb for us (Joh 1:29 and 36) so that if we will apply His blood to our lives by confessing Him as Lord (Ro 10:9), God will pass over us at the Judgment Day.
Jesus was sacrificed on the fourteenth day of the first month of the Jewish year--the exact day and time that the Passover lambs were being slain (Joh 19:14-16). Truly, "Christ our passover is sacrificed for us" (1Co 5:7).
This is why the Christian church as a whole does not celebrate the Jewish feast of Passover but has replaced it with the Lord's Supper, or Communion, that Jesus instituted during the last part of this Passover meal (Mt 26:26-29, Mr 14:22-25, and Lu 22:19-20).