Greg Sterling talks about the evolution of search and new input methods, especially being driven by mobile scenarios/experiences and capabilities.
We’re really just at the beginning of the era of “mobile search.” Even what we think of as “search” will be dramatically altered by innovations in mobile. In this first phase the transfer of what might be called the “query box” (and related links) into mobile is complete. In time, however, we many even come to see that image — the white box with the search button to the right — as a kind of metaphor for something more intangible (i.e., directed intent) that can be fulfilled in a variety of ways.
dariusz' blog 