3D won't die. You'd be crazy to think it would. Because of higher capacity and higher resolution playback nediums - including videogames - 3D will continue to expand and grow into fields much larger than just TV. Medical, production, manufacture, videogames, music, youtube, Facebook, Microsoft, Apple, and of course TV. This isin't your daddy's 3D, it's new, it's better, and the porn industry is already in on it. You know what they say, "You know you've succeeded when the porn industry uses it". Well, thay already are.
It's here to stay, and you'd be shooting yourself in the foot to not support this format. And, for the sake of arguement, this format is a small niche, why still would'nt you want to support it? How much investment would JRiver actually need to add the codecs? Really, just add it to the list of features that sets MC apart from the rest - or rather add this feature that keeps MC up with the rest. Any way you want to look at it, it's a feature worth having.
Jimmy