I have yet to absorb, one is this: pushing and shrinking the icons and having more apps along each other.
Other will show above. To pinch the keyboard and shrink it, see what is there better while writing. I did not get used yet that we can also slide and write, the Mac guesses what we wanted to write. When it guesses right.
And so much more! Black screen etc.
Bellow, the small keyboard while writing this post.