The MS Office Ribbon perhaps inspired the latest slew of apps that use multiple icons without text labels in lieu of a menu bar. However, the implementation of these apps apparently failed to understand or realize the advantages of the Ribbon or even what makes a Ribbon a Ribbon.
Controls labeled with icons alone are more difficult to learn than those labeled with text alone [See Wiedenbeck S (1999). The use of icons and labels in an end user application program: an empirical study of learning and retention. Behaviour & Information Technology, 18(2)]. The lack of text labels for groups of controls in these apps can’t help.
Note that the Office Ribbon generally avoids both of these pitfalls by providing text labels for groups of controls (the Office Logo being a notable exception) and text labels for most individual controls (many controls on the Home tab being another notable exception).
After being subject to much research, the Office Ribbon largely preserved the traditional File-Edit-View arrangement of commands found the traditional menu bar. There’s no evidence that there’s anything wrong with this organization.
IMO, icon-scattered UI designs represent a fashion or branding statement, a rather clumsy attempt to appear “state-of-the-art” like Office, and an excuse to decorate the UI with graphics. They are not a usability improvement.
For everything about the Ribbon, see Jensen Harris’s blog.
My critique of the Ribbon. Not that I'm particularly satisfied with the traditional menu bar and tool bar.