This symposium discussion is based around the 2019 update to the special collection of Research in Learning Technology (RLT) on Mobile Mixed Reality (MMR) Enhanced Learning that the ASCILITE Mobile Learning SIG has coordinated this year - due for publication in November/December 2019 – the authors will use the articles to spark discussion around the critical issues surrounding the design of MMR for higher education, and the current state of the art of these rapidly developing technologies.