In one of my first posts on this subject I indicated that satellite data would play a vital role. I find it interesting that, even after the data suggests it crashed into the Indian Ocean, a retired U.S. general believes it landed in Pakistan. So if they don't find the plane it will likely turn into an Amelia Earhart story or fodder for a terrorist movie - or two. Based on the latest information, I would agree with Cofty (dammit Cofty, be wrong once!!!).
A lot of technological and procedural changes with airline flights/planes will come out of this event, regardless of the findings as to the cause.