tedster - 8:36 pm on Aug 21, 2010 (gmt 0)
Still not sure I'm coming across completely. It's NOT just the Search Suggestions that update. That definitely is old news, most definitely, and it is a good way to see what searches are popular.
But in this test, each change in the Search Suggestions also loads a completely new SERP. Even though you are not clicking on "Enter" to perform the search, the results for the top suggestion are still being loaded on your screen.
So it's not just the Suggestions that update dynamically, the entire SERP updates along with them.