Thank you for your support. I'm glad that you are enjoying SKYBOX.
Good news is, SKYBOX is definitely coming to Microsoft Mixed Reality!
However since the Mixed Reality HMDs are just released, we need to test it more thoroughly and try to make SKYBOX as natural an experience on it as on other platforms. So it might still take a while until you will be able to use SKYBOX in mixed reality. BUT we are absolutely committed to this, and I hope you can be patient and keep supporting us : )