This will provide more information on your potential query in the drop-down box. Why would you want this?
“For example, let’s say you’re flying to London and want to know: Is my flight on time? Or what is the exchange rate of the pound? As you type the flight “Ba 284″ or “Usd in pounds”, the answers are provided right below the search box, without having to wait for the results page,” Google said in its mobile blog.
Go right ahead to google.com for this feature but this seems kind of useless on my Droid. I just hit the softkey on the home page whenever I need to do a search.
[Via Google mobile blog]