Mike,

Thanks for sharing your insights from your experience.  On reflection I think I've seen the same trends, just used different language to describe them.  I think there has been a trend towards more 'Leader' development than 'Leadership' development.  This appears similar to your 'Leadership is becoming more internal trend'.  With change being quicker and more complex the research is pointing towards leaders needing to develop greater cognitive agility, emotional intelligence, and moral judgement.