Its not about destroying or replacing twitter or fb. Thats unlikely and not the goal. Its about new uses. T and FB have defined their contexts and rules. The infrastructure may look very similar but the universe of contexts and possibilities for non T and FB contexts is the point. The space of uses outside of T and FB is vast when publicity and ad focused mining isnt the core driver of business. FB and T have decided to compete for belly fat ads, thats the real shame. However they are both still revolutionary in terms of societal impact, they are just going to coerce their usage to fit their business model. Egyptian protesters and new moms posting baby photos could care less about belly fat ads. I truly sincerely hope both services find a more relevant way so that all models flourish.