The Apple Watch Series 7 could be in line for a redesign according to tipster Jon Prosser. The changes would make the Watch look squared off at the edges and replace the currently rounded off look bringing it in line with the squared off look that started with the iPad Pro design and most recently made its way to the iPhone 12.
https://www.notebookcheck.net/Apple-Watch-Series-7-in-line-for-redesign-with-squared-off-display-in-line-with-iPad-Pro-iPhone-12-look.540117.0.html