Here's a hypothesis that we can expect to see robustly tested over the next 2 (2016) to 5 years (2019):
As JW.org traffic goes up, door-to-door work will go down.
It will be harder to maintain a focus on the motivation and effort required to go "out" into your local territory because the "shift" has started to occur. Hours of preaching may be "covered over" in part by the bums-on-seats cart work - but you will see JWs in your neighborhood less frequently - and when you do, they'll be pushing tracts. No tract will have the Watchtower logo on it. But JW.org will be emblazoned on everything.
And those who are "brought into" the organization will have modeled to them the role of the internet rather than the role of door-to-door work.