This town ain’t big enough for the both of us. It’s a trope that stirs up images of two rough, tough cowboys on opposite sides of the law squaring off in a small tinderbox of a town. Only one cowpoke will be left standing, sometimes leaving the town itself in fuliginous ruin.

Nowadays, the saying might apply more readily to head-to-head battles between Uber and Lyft, iPhone and Galaxy, DC and Marvel—or, in this case, virtual reality and its new challenger, mixed reality, with the AEC industry acting as the too-small town.