To Byrne, shaking up the seating chart at Overstock was a bit like a common management tactic in the military, when an officer will work closely with a small “command initiatives group” that is considerably more nimble than the rest of the organisation. “We were getting bureaucratic,” Byrne said. “And this was a way of creating added competition outside the bureaucracy.” These big companies are trying to duplicate the vibe of a Silicon Valley start-up, where the boss is next to everyone. As start-ups grow, they often put key technology teams next to the chief executive. Greene, who was the chief executive of the software company VMware, said she had always made a point of sitting beside the top engineers because they saw the company’s future. There are limits to these arrangements. When Facebook built a team to explore the future of virtual reality on its vast social network, it made a similar desk move. The group is no longer seated next to Zuckerberg. Facebook said this was because the group had grown too large. But across Silicon Valley, virtual reality is no longer the buzziest of topics. That honor belongs to AI.