Here are sample screen shots of Windows 10 and a few of the changes:

The Start Menu is back: It is customizable and includes metro apps which can be added an deleted. Personalize your Start Menu the way you like it.

Virtual Desktops:
You now have the ability to work in more than one desktop at the same time, switching back and forth as desired.
Virtual Desktops:
You now have the ability to work in more than one desktop at the same time, switching back and forth as desired.

Task View:
Now you have larger app thumbnails to make switching back and forth much easier.

Modern apps on the desktop:
Now you can have multiple Modern apps on your desktop that you can resize.

Snap Multiple Apps:
Now you can snap 4 apps in all four corners of the screen and have space left over for other apps.