What's different about Screensaver preview in Windows 8?

What are the notable differences in screensaver preview functionality between Windows 7 and Windows 8, and how do these changes affect usability?

The screensaver preview functionality in Windows 8 introduced several notable differences compared to Windows 7:

Lock Screen Integration: Windows 8 introduced a lock screen that is separate from the login screen. This means that the screensaver preview is displayed on the lock screen, providing a more seamless user experience.

Slideshow Feature: Windows 8.1, which is closely related to Windows 8, added a slideshow feature to the lock screen. This allows users to see a preview of their photos as a screensaver directly on the lock screen.

Modern UI: Windows 8 features a completely revamped user interface with the Modern UI (also known as Metro UI), which affects the overall look and feel of the screensaver preview.

These changes improve usability by providing a more visually appealing and integrated experience for users. The lock screen slideshow feature, in particular, enhances the aesthetic appeal and makes it easier for users to enjoy their photos even when the computer is idle.