It is easy to pass such facile judgements. It is much harder for the company involved to do anything about them.
I'd be willing to bet that Kodak knew that digital was coming, explored it in their labs, and made a sincere attempt to get on the bandwagon. Lemme google...looks like I'd win my bet. According to [link|http://www.kodak.com/US/en/corp/kodakHistory/1990_1999.shtml|this history], Kodak was selling 1.3 megapixel cameras in 1991!) And they were one of the early innovators in digital imagining. This didn't help them at all.
This isn't an isolated example. Christensen found that CEOs at the losing companies knew long before it happened what bandwagon they needed to be on and tried to do something about it. But there are basic organizational challenges that make this an exercise in swimming upstream, and he only found one CEO who had faced disruptive innovation and managed to force the company to switch. And that CEO said that, had he known how hard it would be, he wouldn't have bothered.
Cheers,
Ben