I am not sure what the point is but I guess some people might find it useful.
The gadget would show search result for the keyword below the search field.
This gadget can be added from the Layout section in the Blogger backend.
Blogger developers said:
Our newest addition to the Gadget Gallery is the Wikipedia gadget. It allows you to insert a Wikipedia search tool into your sidebar, below the header, or above the footer. Insert this gadget by going to the Layout tab of your blog, selecting “Add a gadget,” and finding this gadget in the “More Gadgets” section of the gallery.