The whole thing with Germanwings is sad, and concerning, and maybe some things in commercial passnger aviation will finally be changed.
I'm not sure that this air disaster technically counts, because it did happen in France, and not Germany. But at least one change has already happened, with Europe and other areas adopting the previously adopted rule in the US and Canada requiring two crew members to be in the cockpit at all times.
Hopefully, they can come up with a better system than self-reporting of psychological health issues, since once hired, most airlines never check their pilots on that score ever again.
And it's about time for GPS real-time tracking, and real-time video feed from the cockpit to the ground air traffic control.
And perhaps an "escape mechanism" to allow pilots and or crews to unlock the cabin door in an emergency (perhaps like the three key military system for nuclear codes) that are unique and independent. There's a reason for a locked cabin in terms of hijackings that go back to the 1960s, but there also needs to be a way to get into the locked cabin in an emergency, such as this flight, the recent Silk Airways disaster, and the United Flight 92 on 9/11.
It is very odd to have this many major airline disasters (five) in just over a year. I don't think we've had this many in such a short period since 9/11.