One of the elders (a former close friend) who came by to invite me to the Memorial last year, told me that it "didn't matter if Armageddon came in our life-time or not", when I had said that they've been telling people it's 'right around the corner' for the last 130 years. After he said that, I replied "if it doesn't matter if it comes in our life time, then why are you going out and telling people that it is!?"
Unfortunately, the idea that 'Armageddon is imminent' is the center of the Watchtower's universe and they can't let go of that without risking that their entire house of cards will collapse. Without that fear put into the R&F on a daily basis, the New & Improved Faithful Slave might lose authority of their 'domestics', and that has to be avoided at all costs.
I'm sure that in another hundred years, they will still be out their preaching about how 'close' everyone is to The End, with Field Serve-Us Reports still being handed in at the end of every month. A total waste of human time when you think about all the actual charity work that Witnesses could be involved in that might actually make a difference in peoples' lives.....