I think the microtone piano at the moment has no real use at the moment. It is an expensive and prestigious instrument with no real music composed for it, and as far as I know no musicians that have mastered it to a point where they can play it like they would play a normal piano in any form of ensemble or solo,
Dutch pianist Maarten van Veen did a pretty good job of it as far as I could hear. But of course it is difficult to judge, the sounds being so alien and unfamiliar.
Although it might be useless now maybe the future will bring exciting music where microtonality will play an important role. Music since recorded history has been evolving and maybe microtonality is the next logical step. Be that as it may I Personally don't think that the large public is ready for it, or capable of enjoying it.
Certainly so. It may well be that microtonality, like other tonal experiments, will forever remain at the fringes of music, and attract no more than a handful of adventurous composers and musicians.