This could be a great boon to any ecommerce site while larger sites can really benefit as this could streamline the product discovery process for site visitors.
The post says
The Search As You Type pilot is available to US-based AdWords advertisers for free, up to 25 million searches annually, after which licensing fees would apply.
Search As You Type uses Google’s predictive suggestions and instant product results to enhance a merchant’s existing website search functionality. When shoppers type a search query into a merchant’s site, Search As You Type shows them product suggestions and photos, making it faster and easier for people to spot the product they’re looking for and click through to make a purchase.
Now before anyone gets too excited it should be emphasized that this is a pilot program. If you want to be considered for inclusion in the pilot program you can fill out a form and hope for the best.
How do you like this kind of functionality for your site or your buying experience?