The Financial Times has published an article on the death of retail in the USA.  In addition to being an interesting read about the impact of technology on jobs, it also contains a great quote about the risk of not having a view over the horizon, and the boiling frog effect:

Wayne Wicker, chief investment officer of ICMA-RC, a pension fund for US public sector workers says “These things creep up on you, and suddenly you realise there’s trouble. That’s when people panic and run for the exit.”

I’m betting that senior teams in the companies mentioned in the article have been sitting in their comfortable paradigms for too long, and their own biases have been filtering signposts that may have helped anticipate what’s coming.