As you can see in my previous post I have successfully installed Windows 10 Technical Preview on Virtual Box. Now I want to show you new features which were added in Windows 10 Technical Preview.
No window borders:
Now:

Before:

New show\hide windows animations
Now windows slide from top with fade in effect.
New Start menu
Taskbar in bottom position:

Left:

Top:

Right:

Virtual Desktops

You can easily "jump" between virtual desktops by pressing Ctrl + Win + Left\Right arrows
You can also run each application in "full screen" mode by pressing Ctrl + Win + Up Arrow

Resizible mode for Windows Store application
Now all Windows store application can be resized to any size:

This is only main features, Windows 10 Technical Preview works without any problems. A bit changed design looks good. So I will wait for release and then update my Windows 8.1 to 10.