Although tablets and e-readers have a lot in common regarding function and design, there are some key differences to bear in mind. Tablet computers are multipurpose devices that accommodate professionals, gamers, digital artists and movie viewers. Tablets can even be used to take purchases by sales associates. E-readers offer some of these features but are primarily designed for reading e-books. They often have storage systems and screen lighting options that replicate the book reading experience and make reading on a screen easier on the eyes.