Not all users are seeing the new look, but the recent uptick in interest (and complaints) about the company's changes does indicate that Google is rolling them out more widely than they have before.
Google has been working on a lot of changes to its search results during the past couple of years to make them cleaner and more appealing across multiple types of devices. In an official company blog post last year, Google's senior vice president of search, Amit Singhal, said the search engine would be improving its search products, from both a design and functional standpoint, to find new ways to save its users time. These included the announcement of future features such as voice search -- now being tested in beta for its Chrome browser -- and simple layout tweaks.
Reaction on Twitter has been largely negative, showing that we really are creatures of habit. Observant creatures of habit.
I'm not enjoying Google's new look. The header font is too big in search results.
— Paige Weaver (@MoxieMarmalade) March 12, 2014