Last week we showed the highlights and 10+ minutes of video footage of an exclusive hour-long TechCrunch interview with Microsoft CEO Steve Ballmer. Now for the rest of that interview. The video was just a teaser. I spoke with Ballmer for another 50 minutes on the record, doing a deeper dive into five key areas of Microsoft's product strategy: Big Opportunities, Operating Systems/Browsers, Mobile, Search and Developers. This post is about big opportunities at Microsoft beyond their dual cash cows of Windows and Office.