The most immediate takeaway from the fall of Kodak is clear: Don’t be afraid to cannibalize your own business in the name of progress. This is seen time and again in the digital revolution: Sony’s reluctance to develop a competent digital Walkman left an opening for the iPod. Blockbuster laughed off Netflix in the early days, then went bankrupt when it couldn’t compete with its Web-based competitor. And iPads may be eating up some Mac sales, but Apple’s bottom line is stronger than ever.