I think a good, specific instance of CEO/boardroom dissonance is Square Enix's reaction to initial sales of their (Crystal Dynamics-developed) Tomb Raider reboot. In its first month, the game sold 3.4 million copies, which is a good number of sales by most reckonings. But not Squeenix: they anticipated double that, and even then they thought 5-6 million was a "conservative" number.
The company thought its Lara Croft reboot could sell at least 5-6 million units in four weeks - a huge figure, but a total still designed to be conservative, just "80-90 per cent" of what Square Enix thought was the game's real sales potential.
"We put a considerable amount of effort in polishing and perfecting the game content for these titles, receiving extremely high Metacritic scores," Square Enix said in a new financial statement. "However, we were very disappointed to see that the high scores did not translate to actual sales performance, which is where we see the substantial variance in operation profit/loss against the forecast."
That they expected a reboot of a franchise that had diminished tremendously in popularity could put out such numbers just shows how disconnected they are from reality.