Daydream is Google's VR offering and it was announced alongside Google's newest Pixel devices. The Daydream platform is Google's own and the first devices that are compatible are the Google Pixels, and more recently the Moto Z and Z Force on Verizon which have already been updated to Android Nougat. With the openness of Android and the vast community of Android fans and developers, software can be manipulated to trick it into doing things it's not programmed to do from the factory. Any smartphone running Android Nougat should be able to support Daydream in theory, this isn't the actual...
Source: http://www.gsmarena.com/rooted_nexus_5x_on_nougat_supports_daydream_vr_with_this_mod-news-22157.php