The #iPad is a success. It has brought together functionality in a new form factor that is considered to be compelling. It has its drawbacks though. The main one is expense. Not only is it expensive to buy, content has to be bought through a monopoly store. This precludes very much the use in education and other environments that operate on a budget.
The keynote speech of Nicholas Negroponte at the Mobilize conference informs about the OLPC next generation computer. A computer that is a tablet. A computer that brings books to children. A computer that seriously makes sense.. The price tag: cheap. Consequently the possibilities are limited by your imagination.