The average JW will not believe a word of what is shown. That was the case over here for Dateline. It might cause some to doubt a little though and that's important. Don't expect any sudden quick changes. Most won't have that.
For those of us who already had doubts, Dateline was the straw that broke the camel's back, so it is very important for JW's to watch. It's basically what finally got me to see the light - I went on the SilentLamb's website, then others, then here.
One thing that the WTS says on the show (a preview was aired last night) is that the Watchtower Society went through a "learning curve" in how to deal with this issue. The problem with this statement is that according to the WTS, they are God's channel of communication to humans, so they should be way ahead of the game, not on a learning curve because of litigation and so-called apostate t.v. programs. In Psalms (I believe it is the 97th Psalm) it states that God's word makes the "inexperienced one wise". So why isn't the WTS wiser than worldly people in dealing with such shocking abuse?
Also, several months ago a letter was read out to the congregations (I was there and heard it myself) which stated that blah, blah, blah, the WTS condemns child abuse, but they still insisted on having "two witnesses" to the crime. That doesn't come from apostates, that letter was from the WTS. The two witness rule is ludicrous and cruel, yet JWs are still expected to comply with that rule.
As another point, many JWs (and some have already spoken to me about this and are worried about tonight's program) already know of cases of abuse, so this program is just putting out for public consumption what the rank and file already know (many of them, at least).
Yes, your husband should watch it in case people in the territory come up with arguments such as the above. You can ask yourself how he would explain the above.
Maybe the above is not the way to reach him, I don't know, but that's my reaction when I hear JW-speak. And yes, there's a chance it will put a crack in some those automatic defenses.