This is what Google has to say.This article on blogoscoped will show the features leaked to the net accidentally .

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Google Chrome is Google’s open source browser project. As rumored before under the name of “Google Browser”, this will be based on the existing rendering engine Webkit. Furthermore, it will include Google’s Gears project.
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The browser will include a JavaScript Virtual Machine called V8, built from scratch by a team in Denmark, and open-sourced as well so other browsers could include it.
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Google Chrome will use special tabs. Instead of traditional tabs like those seen in Firefox, Chrome puts the tab buttons on the upper side of the window, not below the address bar.

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The browser has an address bar with auto-completion features. Called ’omnibox’, Google says it offers search suggestions, top pages you’ve visited, pages you didn’t visit but which are popular amd more.
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As a default homepage Chrome presents you with a kind of “speed dial” feature, similar to the one of Opera.

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Chrome has a privacy mode; Google says you can create an “incognito” window “and nothing that occurs in that window is ever logged on your computer.”
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Web apps can be launched in their own browser window without address bar and toolbar.
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To fight malware and phishing attempts, Chrome is constantly downloading lists of harmful sites. Google also promises that whatever runs in a tab is sandboxed so that it won’t affect your machine and can be safely closed.