I doubt that much will come of it.
Just because someone is 'under oath' doesn't mean squat if there's something that wants to be kept hidden. You'll be amazed at just how much people 'forgot'... "I don't recall that"....
It's pretty obvious that those in power have a complete disdain for things like 'laws'.
And, then don't forget the control over the media and the release of information.
Remember, this sort of shit has been happening for millions of years. It's a real long game in play, and this will be a mild blip... (Unless... those above bother to show their face to help out!)