In seeking to interpret the answer given by the Lord Jesus to this request, we should remember he spoke to his disciples in the light of where they stood and what they could grasp at the time. It was before his suffering, resurrection and ascension to heaven, with all the privileges that resulted from those events. Those making this request had an earthly kingdom in view, but we can learn so much of practical value from the pattern he laid down for them.
Christians know themselves to be already included in the kingdom of God with their citizenship in heaven, but still may learn from this prayer.