Don't think in 10 years it will be the end of the Watchtower Organization, but it will be substantially smaller. First, it was the end time prophecies that expired, then the slowly staged emphasis & worship of the Governing Body and new light doctrinal changes that had no biblical support, nor made any sense at all. (over-lapping generation, GB only is the F&DS) Finally, the internet has exposed all the Watchtower Society's lies & dirty secrets to the point where it is now seen as a cult religion by most.
The JW leadership has two options to try to hold this religion together. (1) Come up with an end time theology that is more in-line with pre-1995 beliefs (this generation, F&DS, UN, King of N&S, Babylon the Great, etc. Big mess to clean up here, but they can blame apostacy on someone within, and proclaim a cleansing of the temple. etc.) They also need another Armaggedon date that will give the current JW's a sense of urgency again and also possilbly scare faders back into the fold. (2) Keep changed beliefs and things the way they are, but just loosen the reins, be less cultish, and become more mainstream.