SEO (Search engine optimization) will change as well. Sites will need to optimize for particular letter combinations, not just entire keywords. It will be interesting to see whether results get spammed or if Google will gain the upperhand in this constant cat and mouse game.

More on TechCrunch:
http://techcrunch.com/2010/09/08/google-instant-speed-volume/

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http://www.youtube.com/leanback

"Our old index had several layers, some of which were refreshed at a faster rate than others; the main layer would update every couple of weeks. To refresh a layer of the old index, we would analyze the entire web, which meant there was a significant delay between when we found a page and made it available to you.

With Caffeine, we analyze the web in small portions and update our search index on a continuous basis, globally. As we find new pages, or new information on existing pages, we can add these straight to the index. That means you can find fresher information than ever before—no matter when or where it was published."