Google is preparing a search interface that allows you to see results as you print the query.
Google is testing a new search interface in which the results are updated as the user types a query. Accordingly, the user does not need to press Enter or the Search button, since Google constantly shows the results of the current query.
So it looks like:
The new interface is not available in Google Labs, but you can try a similar one in Google Alerts (write keywords, click “View results” and the results will be updated each time the keywords change). There is also a Keyboardr , a site that uses the Google AJAX API to display results after typing a query.
UPD 2: another user noticed a change: when you go to the Google homepage and type in your search query, the search bar moves to the top of the page, and the search results appear below. To turn off the new interface there is a link "turn off sreaming" near the search line.