Hi Shawn,
Google does not look at page content the same way humans do. Google is more concerned about you providing a good experience for your users. I believe that using tabs, if coded correctly, is one way of providing good experience and additional information.
If you view this text only version of the dell.com page you referenced, you will see how Google is viewing that page - there are no tabs, simply text and hyperlinks.
As far as SEO is concerned, it used to be the goal to put all of your important content, above the fold; however, that is not as important as it once was.
If you Google: site:www.dell.com Native HD 1.0 MP webcam with dual digital array microphone, you can see that the Inspiron 15z Ultrabook appears in one of results. This text is on the Tech Specs tab and is still being indexed by Google.
Long story short - Google "should" (depending on the way you set up your tabs) be able to crawl, index, and rank your page when you use content on tabs.
Does that answer your question?
Mike