Dalai Felinto shares a detailed overview of the targets (as well as the 'out of scope' targets) of Blender 2.8. It goes on to describe different 2.8 concepts in more detail.
This document is for Blender developers and other contributors to the 2.8 project. It is meant to provide focus and general agreement on technical design decisions. It will allow to empower everyone to contribute more efficiently. UI and further usability design of features will happen after this, as an ongoing project.
“Blender 2.8 will enable artists to work faster and more efficient. Emphasis is on helping specialists or to enable specialist tasks better. 2.8 will allow Blender template/configurations to start with reduced or different user interfaces.”
The idea is to optimise one’s personal workflow better, instead of trying to maintain a single configuration that attempts to provide all the possible tasks at the same time for everyone.