You only have to look at the average age in most of the organ videos to realize just how much longer this is going to remain relevant, even in Europe. Yes, I know there are 'enthusiast' audiences for organ music, but there are also enthusiast audiences for crumhorn and sackbut ensembles, and it doesn't make THEM any more relevant to today than that...
When that generation dies out (and that performance is doing its' part!), who's left but the players alone? Might as well take up the virginal. At least some decent composers wrote for THAT...
Who ARE relevant European keyboard players today? Muse, and the like. And they SURE don't play home organs (or arrangers!)