Why the change, you ask? Straight from Google’s mouth:
Since Chrome is all about making your web experience as easy and clutter-free as possible, we refreshed the Chrome icon to better represent these sentiments. A simpler icon embodies the Chrome spirit — to make the web quicker, lighter, and easier for all.
And there you have it folks. Chrome is seamlessly simple, and now its icon is too.
[Via GoogleBlog]