OP, the blindness that God puts on people can be incredible. The verse you quote is;
Matthew 16:28  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.


But right in the next chapter, this is fulfilled by Peter, James, and John when they hear the Father telling them to "hear" i.e. obey His Son Jesus. This established the Kingship of Jesus.

Matthew 17:1  ¶And after six days Jesus taketh Peter, James, and John his brother, and bringeth them up into an high mountain apart,
2  And was transfigured before them: and his face did shine as the sun, and his raiment was white as the light.
3  And, behold, there appeared unto them Moses and Elias talking with him.
4  Then answered Peter, and said unto Jesus, Lord, it is good for us to be here: if thou wilt, let us make here three tabernacles; one for thee, and one for Moses, and one for Elias.
5  While he yet spake, behold, a bright cloud overshadowed them: and behold a voice out of the cloud, which said, This is my beloved Son, in whom I am well pleased; hear ye him.
6  And when the disciples heard it, they fell on their face, and were sore afraid.
7  And Jesus came and touched them, and said, Arise, and be ngot afraid.
8  And when they had lifted up their eyes, they saw no man, save Jesus only.