In the nearest days the biggest search engine, Google, plans to launch new feature: to show preview of web sites in the search results.
Experts predict that this change increase the importance of web site design, since users will see how web site looks before the visit.
Google expect that this feature improve users satisfaction from search and can help them find what they want more efficiently.
Right now function is optional, but you can turn it on from http://www.google.ru/landing/instantpreviews/
My personal use show that so far the feature is quite raw, previews are often long to load and blurry, maybe it will be better after official launch.