With their advancement into web based programming and their soon to be broadcast meetings the need for a physical meeting place is quickly diminishing. I predict that the large scale sell-of of Kingdom Halls will begin in the next few years as the people get their meetings online. The one thing that would be missed with a liquidation of KH halls is "upbuilding" association which will force the Society into creating a JW social media app which will not only allow for association but close monitoring of the pubs. The herd mentality will keep most of the pubs from posting anything innappropriate much like people watch what they say when in the KH or in service.
It is telling to see how the brothers and sisters have embraced social media for posting the jw.org nonsense.