First, I believe the Scriptures teach that the generation that sees the re-establishment of Israel (May 14, 1948) will live to see all the end time prophecies fulfilled (Matthew 24: 32-34).
If you're right, we are talking no more than 60 years!
Brother David, one thing to remember is......
Matthew 24:36 But of that [exact] day and hour no one knows, not even the angels of heaven, nor the Son, but only the Father.
When 40 years passed in 1988 without fulfillment of any of the events surrounding the Second Coming of Christ, the 40-year generation theory fell into disrepute. Either 1948 was not the starting date for the generation described in the fig tree parable, or a generation must be longer than 40 years, according to the theory. Additional arguments put forth claimed that 1967, the year Jerusalem was captured, or some other future date could be the birth of the generation that would see the return of Christ.
Some proponents of the "end times" generation theory questioned whether 40 years was actually the length of a generation today. Is there any evidence to suggest that the length of a generation is longer than 40 years? A few sources hold that a generation is now 20 to 30 years in length (but this better represents a generation "gap"). Other opinions range from 40 to 100 years.
A generation, as described in the Bible, begins at conception and ends at death (Gen 17:6-9; Ps 22:30; Jer 1:4,5; Act 13:36; Josh 24:29-31). The length of a generation is not an arbitrary period of time that occurs within the life span of an individual or group of people.
Joshua's age at the time of death, 110 years (including 9 months gestation), was the length of the generation he represented. Some of his generation died before him and some after him. Consequently, the average life span of a group of people living at about the same time constitutes the length of that generation.
If the length of David's generation, Christ's generation, and the average life span of those living today in Israel is between 70 and 80 years (a 3000-year span), it would be reasonable to conclude that the generation
Christ was talking about in the parable of the fig tree will also be 70 to 80 years in length. If the fig tree in this parable represents the nation of Israel, as many prophetic scholars believe, and the generation that is described has a life span of 70 to 80 years, then recent events such as the rebirth of Israel as a nation (Isa 66:8), the Jerusalem controversy in the "end times" (Zech 12:1-3), preparations for rebuilding the Jewish Temple (Rev 11:1,2), and the ongoing negotiations for a peace treaty between Israel and the Palestinians (Dan 9:27) are strong indicators that the generation Christ was talking about has already been born.