I still think it's the best/most insightful/most useful business book ever. The implications of truly understanding that book and disruptive innovation can be huge if you're a company founder or a CEO, Product Manager, etc. It's not so easy to internalize. I'm sure a lot of CEO's have read it by now, but I can barely spot some that follow it.

Btw, what do you think about Microsoft trying to apply its desktop OS, descendant of Windows NT, to tablets? Aren't tablets disruptive innovation to desktops (in Christensen terms) and therefore the entire plan is doomed? It looks to me they are making classic management mistake like ones the Christensen's book is full of.

Rumor has it right now that they're dropping the Desktop 'app' entirely from ARM tablets.

FWIW, every time I run across a friend who still works there, I urge them to read this book. They usually have already.