The new branch come with the new render Eevee and many of old 2.79 features:
- Cycles: Built-in Denoising, Shadow catcher, Principled shader, AMD OpenCL optimizations.
- Grease Pencil: New frame interpolation tools, per-layer onion skinning.
- Alembic: Improvements to compatibility, stability and support.
- User Interface: Initial support for reusable custom configurations, automatic DPI scaling.
- Twenty Three new and several updated add-ons.
- And: 100s of bug fixes and other improvements!