Amazon launched its first Kindle Fire tablet in 2011, and the lineup has changed many times over the years. The company dropped Kindle from the name and sold them as Fire tablets, tried its hand at premium models, and largely settled on the idea of cheap tablets running a fork of Android called Fire OS. But now Amazon is launching the biggest update in years. The new Alexa Tablet line of devices are mid-range models with some premium features available on the largest models. They have screen sizes ranging from 8.7 to 12 inches.