What are the effects of Windows Live for Search Engine Opimisation Specialists?

Reuters continues to publicise and discuss the Search Engine MSN 's revamped image of Windows Live Search. It will allow users to display all query results on one page without moving from page to page - so what will the impact be for seach engine optimisation specialists and their clients? "People are getting less and less satisfied with search," claims microsoft.
Microsoft trails Web search leader Google and number-two Yahoo. Once the new search engine is officially launched in the summer, Windows Live Search will replace MSN Search on Microsoft's main content Web site, www.MSN.com.
The company's research consistently shows that one out of every two Web queries still fail to produce the answer sought by the user, fueling dissatisfaction. With more results shown on the page, in theory, it will be easier for search engine optimisation specialists to increase their clients ROI. If a greater number of results are shown on the page how will this affect search engine marketing? will pay per click marketing - overture - be reduced in size on the page?