The response to the concerns is no surprise, they hope that it will be used after Armageddon.
The same thing was mentioned about their Jesus video series which they are planning to do in Sydney, Australia. Work has been underway in building the set. They've been spending a lot of time trying to make it look old and making concrete look like stone but it just looks like all the fakeness that you see in places like Disneyland.
They really think that its a possibility the Jesus video series will be used in their 'new world' to teach resurrected ones about the life of Jesus on earth.
By their own teachings, even though they say that all Christians still alive after Jesus dies are in heaven, there are still thousands that could give a factual and more detail account of his life on earth from having been eyewitnesses.
I guess this 'new world' is going to continue to have movie screens. That should be enough of an excuse for JWs to go and get training in anything to do with this technology.