How about the new window shadow effect of Win10 system?

After the Windows 10 Technology Preview was released, people began a journey of early adopters. In addition to the new UI, Microsoft has introduced a new window shadow effect for the system. At first glance, many people may think that the Windows 10 Explorer is not much different from Windows 8. But after the window is enlarged, you will notice another visual difference besides “Share”.

In fact, as early as July of this year, foreign media has already reported "Visual Differences" on Windows 10.

Left: The drop shadow effect on the selected window; right: The window is not selected.
This kind of shadow is so subtle that many old Win8 users are not able to react quickly. If you have already installed the Windows 10 Technology Preview, you can also try to open two windows for comparison.