[muyyatin]

Typing in a particular phrase in the Google search box won't delete all of your mail and files, so you could think of it as a "safer" or "immutable" shell.

CLI in contrast can modify things, not just give you back information.

[kevinconroy]

In some sense, the omnibar in Chrome is the CLI interface for Google. It both manipulates your browser and does searches. Probably wouldn't take much for Google to expand on this and add commands to help you send emails, interact on G+, and more.