At present a lot of people have search history drop down boxes generated by their browser like the one below that show the users search history as an aid to save them from typing common queries again in full.
These will now be replaced by results like the ones below generated by Google that show popular queries other people are searching for.
Can you tell the difference? I can but 95% of Google users won’t be able to.
Search Suggest is actually a very clever move by Google, as well as helping people search they are able to direct them away from long tail queries and towards the very lucrative Adwords filled short tail queries.
Some blogs are already predicting a fall in long tail traffic because of this.
Personally I don’t predict that websites will see any difference in the traffic they receive but I have no doubt whatsoever that this enhancement in user experience will have the added effect of making a few million dollars a year in revenue for Google.