I've read that it's structurally pretty much the same as the existing MacBook Pro matte finish screen. As a matte user, I didn't realize it, but the glossy models have an extra pane of glass covering the entire display. The retina displays drop that extra pane of glass too (but are glossy).

This picture shows the difference: http://www.notebookcheck.net/typo3temp/pics/23da9d8f6b.jpg