I'm under no illusions here - I don't think anything will change in the grand scheme of things. Christian missionaries worldwide are not about to give up their careers because of this one group of evangelical leaders.
Nevertheless, this is still big news. If the leadership of prominent ministries can come this far, then maybe in time, they'll walk the next few steps and decide that Jews (gasp) have the right to want to remain Jewish.
Naw. I'm just fooling myself now. No Christian missionary will ever come to this conclusion. They'd have to abandon or ignore large chunks of their bible in order to come to that decision.