circa 2006 - "smart phones are too expensive and the world will need years to catch up"
That statement is unequivocally true today as it was 5 years ago, and it will be so 10 years thence. There are over a billion mobile phones in use right now, and a majority of them are not smart phones.
circa 2008 - "netbooks are just too cheesy, no one will buy that"
They ARE cheesy, but some people do buy cheesy. The iPad is proof of that.