One hypothetical killer app for me is the ability to have unlimited displays arranged spatially (the last part is important - virtual desktops on normal displa

One hypothetical killer app for me is the ability to have unlimited displays arranged spatially (the last part is important - virtual desktops on normal displays just don’t work for me), as well as visualisation of complex system states in a way that can make use of our built-in spatial reasoning abilities. You need pretty dang dense VR displays for this, and the old stuff was nowhere close to being usable.