Beyond Java "In Beyond Java, Bruce chronicles the rise of the most successful language of all time, and then lays out, in painstaking detail, the compromises the founders had to make to establish success. Then, he describes the characteristics of likely successors to Java. He builds to a rapid and heady climax, presenting alternative languages and frameworks with productivity and innovation unmatched in Java. He closes with an evaluation of the most popular and important programming languages, and their future role in a world beyond Java."
This is a fairly uninformative description.
In a recent interview he said: "I make the point that conditions are ripe for an alternative to emerge. I don't pick what the alternative will be. I just show some of the productivity problems with Java and I show the types of projects in other languages that are interesting. Frameworks like Ruby-on-Rails, Seaside and continuations servers in Lisp and SmallTalk could well become catalysts for another language."
Some more detail is here. It's probable that it's going to mention Ruby. He does mention that: "When you’re mapping a Java class to a schema, you must often type the name of a property five times...Three in the bean: the getter, the setter, the instance variable. One in the schema: the field. Two in the mapping: the property, and the column. In Ruby, you type it once."
But Ruby on Rails is eight times slower than Java. It'll never take off because it's too slow. Where have you heard that before?