Grand Challenges in Cross RealityChristoph Anthes, Mark Billinghurst, Uwe Grünefeld, Hans-Christian Jetter, Hai-Ning Liang, Frank Maurer, David Aigner, Craig Anslow, Guillaume Bataille, Abraham G. Campbell, Judith Friedl-Knirsch, Alexander Gall, Renan Guarese, Sebastian Hubenschmid, Yue Li, Fabian Pointecker, Andreas Riegler, Daniel Roth, Rishi Vanukuru, Nanjia Wang, Lingyun Yu, Johannes Zagermann, and Daniel ZielaskoIEEE Transactions on Visualization and Computer Graphics