Ribbons

The ribbon in Office 2007 is clearly influenced by tab-based global navigation used in web sites -- complete with the concept of "Home."

From: Barnes & Noble

From: Excel 2007

Not surprisingly, the idea of a ribbon (essentially, a horizontally-oriented menu) is now showing up in web applications. Smartsheet, a web-based  collaborative spreadsheet, uses a ribbon-like approach for its menu of commands.

From: Smartsheet

I think we will see more merging of conventions between desktop and the web as the distinction between these two environments becomes less and less relevant.