This is Marissa Mayer’s Yahoo! now

The changes are cosmetic and symbolic. They’re also the most important changes that have happened to the Yahoo! homepage ever because of what they mean.

This is CEO Marissa Mayer’s Yahoo! whether you notice it or not.

The functionality on both the PC side as well as the mobile side are improved. It’s dramatic in that it’s quite different from the old look but not so much that people have an opportunity to complain. The same basic design is there. This is important because wholesale changes to look, feel, and functionality have proven disastrous for most who try it and Yahoo! doesn’t have a popularity issue. The old homepage worked just find for millions. The new homepage is enough to spark interest but not enough to drive current visitors away.

According to the blog post:

Designed to be more intuitive and personal, the new Yahoo! experience is all about your interests and preferences. Since streams of information have become the paradigm of choice on the web, we’re introducing a newsfeed with infinite scroll, letting you experience a virtually endless feed of news articles. Whether you are a sports fanatic or entertainment buff, you can easily customize your newsfeed to your interests. And, to make Yahoo! even more social, you can log in with your Yahoo! or Facebook ID to get articles from thousands of news sources as well as those shared by your friends.