"Page layout forms the foundation in presenting search results. Your layout decisions for search results pages will have tremendous impact on the user experience for your entire site. Choosing the right width for search results is important, and the optimal width for search results may be a great deal narrower than some people using big monitors would believe.
To see for yourself the narrow divide between great and barely usable search results layouts, take a look at Figure 1, which shows the primary gateway to the Starbucks shopping area. When it comes to page layout, this Starbucks search results page shows very poor design choices. At a screen resolution of 800 x 600 pixels, most of what you see is the left margin of the layout and a large logo.
Although there are many ways of using horizontal space on search results pages, we can generally distinguish between liquid and fixed-width layouts. Each style of layout offers a unique set of challenges and opportunities." (Continued via UXmatters, Greg Nudelman) [Usability Resources]