But if you go out one orbit, to a company like Logitech, which makes the add-ons for PCs – the mice, keyboards and speakers – the rapid decline of the personal computer ecosystem is especially stark.

In the past two years the California and Switzerland-based company has seen its stock slide 62 percent in value. Sales in the most recent quarter, which ended December 31, were down 14 percent as Logitech posted an operating loss of $180 million. “Continued weakness in the global PC market was the primary factor in our disappointing Q3 results,” is how newly installed CEO Bracken Darrell summed it up.