Search in the mobile domain is going to look so different from the way we use search on our PC. As described below in the article about the “Now, New, Near” web, the PC search is used mostly as a tool of reference. To be accessed in similar contexts everyday( at home in the evening, in the office)
The Mobile search functionality will be more a tool in our daily lives. To be used “all the time” in every situation. This will make it more relevant for a search function to understand the various contexts in which the search is requested.
Here is a nice example how Windows sees Mobile Live Search: