"New action" or similar name instead of "New tab"?

I've thinking if would be a good idea change the denomination of the "New tab":

http://www.flickr.com/photos/ftosete/6066330615/

for something as: 

- "New action"

When the user create a new tab and type an URL in the Awesome Bar get a web site, an app or similar.

Pro:
"New tab" evokes in the mind of the user the metaphor of a folder with tabs while "New action" evokes the idea of "next step".

Cons:
The change is important because it impacts directly on the user's mental model.

is correct the current model? Is correct the name of "Tab" to denominate an "information space"?

At present this model is centered in the concept of "Tabs". Is "Tab" a good name to evoke a concept of "information space" (site, web app) or in the future the results of an "action"--> search...

With Panorama user groups tabs.

http://www.flickr.com/photos/ftosete/6066583197/

If the denomination of "New tab" is changed to "New action" the connection between the tabs and Panorama is not obvious.

Opinions about all of this?