Have you ever been to a party with your wife/husband/significant other and start telling a story. As your speaking, that person cuts in and finishes your sentence. Google Instant is like that person only they interupt you on every word you type. In Google Instant, each time you type a letter, Google predicts what your typing and shows search results that change with each letter you type.
either your going to like Google Instant, or you are going to hate it. There is no in between. How will Google Instant affect domains? I have heard thoughts on each side, however I think we have to wait and see. One thing is for sure, if it lowers Google’s revenue, it will be stopped. Unfortunately, I cant say that about people finishing your sentences.