Belle refresh started rolling from last week, and now it has been released for all the devices including Nokia 500 and E6. This is another thing however that not all devices will receive the update at the same time.
Just bringing two demo videos of Belle refresh update on Nokia E7 and Nokia 500 posted by users on YouTube. The videos are not of the highest quality though, but the uploaders have tried to demo the change they got on their devices with “Belle Refresh”.
Demo on Nokia E7:
Demo on Nokia 500: