A few interesting features:

One box for everything
Type in the address bar and get suggestions for both search and web pages. i.e. type in ‘neonrain’ and it will suggest neonrain.com or a search for ‘neonrain’

Thumbnails of your top sites
Access your favorite pages instantly with lightning speed from any new tab.  No more lists, you can actually “see” a visualization of the web site.

Shortcuts for your apps
Get desktop shortcuts to launch your favorite web applications.  Integrating the web as if it were an application installed on your machine.  With Google Gears, you can even run apps while being offline.

Dynamic Tabs
Drag tabs to change the order or pull a tab into it’s own window.

Crash Control
Run an application in it’s own “sandbox”, so that each application has it’s own safe area.  If one application crashes, it does not affect another tab.  Includes a Tab Task Manager to view resource usage by tab.

Incognito Mode
Stops the storage of cookies and sessions after the window is closed.

Simpler Downloads
Downloads appear in the status bar and you can drag them from there to your desktop.  Hmmm. Just like Firefox, what’s new here?

Instant Bookmarks
Click a star to create a bookmark, again…what’s new here?

For more details on Google Chrome, here is a video from their developers:
http://www.youtube.com/watch?v=JGmO7Oximw8