History is filled with stories of companies that dominated their segment and then either fell from that high spot or fell off the map. RCA is probably the best example of a firm that went from dominance to obsolescence because, in its case, it played chicken with the U.S. government and lost. A lot of us think the iPad is unstoppable, but many of the same people thought netbooks were going to take over, that Windows tablets would eclipse laptops, and that Apple was going to fail in the 90s. Just because you believe in a thing doesn’t mean that thing is true.