I think it is ironic (not totally sure if that is the correct word) but in the Middle Ages the printing press saw a decline in the power and prestige of the Roman Catholic Church.
I have consistently said in this forum since I joined in 2003, that the internet will prove (when history is written) to be a huge nail in the coffin (not necessarily the total demise) of the WTBTS.
It is all about control - control of information, and the Internet is all about free flow of information.
Even the WTBTS has started using it more - downloads of WTs, etc. As the OP -Metatron has pointed out - it totally has changed publishing/printing in general - so even magazines/periodicals/newspapers (even porn) are struggling. We are in a brave new world. Watch this space