Here’s the Blender 4.0 content reel while you wait for the site itself to update
https://youtu.be/eoY1Mc70uTo?si=ttU7szWsbWNXwLEz
The new features overview
https://youtu.be/LcQkk7NbOoY?si=ldo4tKz2WonBSe0h
The introduction to Node Tools https://youtu.be/Y8Udi1AkdGY?si=95AKQ0tUg4FJSLpM