About preview features

There is a main topic on this section titled "Preview of 2020.1 Features".
Great!
So it says the main features are:

• Particle System Improvements
• Add StickyNotes to GraphView
• Zero performance cost Editor Attaching when debugging
• New Input Package
• Support for serializing fields of generic types directly
• Adaptive Peformance
• Skinned Instancing

but only the "particle system improvements" has a link.
How can I discover what the other "titles" are related about?
(luckily for me I already know what is the "New Input Package", the "Add StickyNotes to GraphView" and... I can imagine what it is "Zero performance cost Editor Attaching when debugging"... but you should provide more references, please).

 

Is skinned instancing based on this? https://blogs.unity3d.com/2018/04/16/animation-instancing-instancing-for-skinnedmeshrenderer/