Some Shall See the Kingdom

For the Son of man shall come in the glory of his Father with his angels; and then he shall reward every man according to his works.
Verily I say unto you, There be some standing here, which shall not taste of death, till they see the Son of man coming in his kingdom. Matthew 16:27, 28
Evidently Jesus is talking of two different things. In verse 27, He is talking about His return to earth and the reward that will be given. Then in verse 28, He says that some of those standing with Him would not taste of death until they saw Him coming in His Kingdom. That was nearly two thousand years ago! How could those men not taste death until Jesus returned in His Kingdom?
When Jesus said, There be some standing here, which shall not taste of death, till they see the Son of man coming in his kingdom, He was not referring to the literal Kingdom of God which is going to be set up here on earth after His return. This statement would surely prove that Jesus was talking about the Kingdom of God that is within man.
When Jesus was raised form the dead, He came forth as the glorified Son of God. He carried His blood into the heavenlies and made atonement for man, setting in motion the New Covenant.
As the risen Christ, He appeared to His disciples many times. One time, according to John 10:22, He breathed on them and said, Receive ye the Holy Ghost. 
I believe this is symbolic of what happened on the day of Pentecost. (Acts 2:1-4.) They were all in one accord in one place; and there came a sound of a rushing, mighty wind that filled all the place where they were sitting. On that day, Jesus came to dwell in the hearts of men in the Person of the Holy Spirit. The Kingdom of God truly had come to earth!
During His earthly ministry, Jesus, the Son of God, met all the needs of the people in that day: He healed the sick, raised the dead, cast out demons, and on two occasions fed the multitudes with only a few loaves and fish. 
After doing all these things, He said to them, It is expedient for you that I go away (John 16:7). In other words, “You would be better off if I go away.”
I am sure they thought, “How would we be better off if He goes away?”
Then He said, If I go not away, the Comforter (the Holy Ghost) will not come unto you. In that day, Jesus was able to minister only to the people He came into contact with. Limited by His physical body, He could be in only one place at a time. So it was better for Him to go away and send the Holy Spirit. Once He had come in the Person of the Holy Spirit, His power would be limitless.