Google yesterday Google Chrome, Google's own browser based on Webkit. Read the comic to fully appreciate what it's about. To me it seems that Google is promoting the browser to an operating system with Chrome. For instance because it has its own task manager:
and that each tab lives in its own process. This is not only safer, but also means you can see which tab (=application) is using up all the resources and simply kill it by closing that tab. I often have the problem with Firefox where one tab uses a lot of resources and I can't figure out which so I have to kill the whole browser. With chrome you don't have that problem.
Sadly Chrome is only available for Windows right now. I'm currently testing it on a virtual machine on my mac:
and I must say that even like that it's quite snappy and it looks nice.
Can't wait for a Mac version though.