A screenshot of Startup Disk in Tahoe from ATP's Podcast notes

Today, MacBooks and MacBook Pros feature a design decision. Pay attention. The top corners of the MacBook feature a rounded corner. However, the bottom corners don't.

Dig deeper and you will realize that the corner radius is concentric with the outer radius of the MacBook lid. However, while the bottom of the lid also features the same radii, it's not visible to the eyes. As a result, Apple made the decision to keep the LCD square while gently curving the corner of the windows. So you get some of this.

Curved corner of an application window meets the square of the LCD.

With Liquid Glass, the whole corner radii are going on steroids.

mac OS 26 Tahoe also adopts the same behavior. To me, this suggests that the next laptop will have rounded screen corners in the bottom also. Overall, my issues with Liquid Glass still hold - there's a crunch in space for the content with no net new benefits other than it looks cool.