Good question.
Looked at Dell’s web site and no mention. However, The link below will take you to the people that test and evaluate with more information.

What were seeing now is the next generation of computing where application will be on the Internet.
"Cloud Computing" is beginning to take off and many computers will only require a browser and a fast processor that will handle downloading and retrieving applications from the Internet.

Looking at the information on Dell’s site it would come with Windows 7..This is very unfortunate as security is much more important when spending time on the Internet..OpenSource software (Linux) is by far the choice that is dominating the security issues in this next generation of computing.

The links below will give you all the information about this computer.
Have fun
tom

More information on this is available at http://www.pcworld.com and http://www.psmagazine.com ..Again this is where they test and evaluate with no bias…Feedback is important part of their evaluation. .