This morning’s Observer column.

Coincidentally, in that same year, Gates stepped down from his position as CEO and began the slow process of disengaging from the company. What he failed to notice was that the folks he left in charge, chief among them one Steve Ballmer, were prone to sleeping at the wheel.

How else can one explain the way they failed to notice the importance of (successively) internet search, online advertising, smartphones and tablets until the threat was upon them? Or were they just lulled into somnolence by the sound of the till ringing up continuing sales from the old staples of Windows and Office?

But suddenly, that soothing tinkle has become less comforting. PC sales are starting to decline sharply , which means that Microsoft’s comfort zone is likewise set to shrink. Last week, we had the first indication that Ballmer & Co have woken up. In a 2,700-word internal memo rich in management-speak drivel , Ballmer announced a “far-reaching realignment of the company that will enable us to innovate with greater speed, efficiency and capability in a fast-changing world”.