Not at all. Although not fast growing, tablets are still great business. Not all people like to carry those monstrous phones in their pockets. Even if you do, its hard to enjoy details while streaming high def content, planning trip, reading books with pictures/diagrams, do email jujitsu, play high def games and so on. Tablets are far more popular among kids age < 10. I see the transition where laptops would be largely extinct and tablets with keyboard dock would be a norm. It has already happened but not yet full scale. The future user base would be divided between two groups where power users would own tablets + phone while more typical users would own only phone. Giving up on tablets entirely is unwise. Power users are minority but they have lions share of influence.