Google is already doing something similar. It's neat and does add to the 'wow' factor. But it's not very usefull IMO. Are we getting so lazy that we can't even press 'enter' on our keyboards or click a button with our mouse?
It's not that ... but like when I search for weather ... I type in New London weather and it gives me my weather instantly ... I don't have to click or even wait for another page to load. I like it.