ZD Net has some information about an upcoming operating system from Microsoft that's based on their Singularity project:
“There’s a seemingly related (related to Singularity) project under development at Microsoft which has been hush-hush. That project, codenamed ‘Midori,’ is a new Microsoft operating-system platform that supposedly supersedes Windows. Midori is in incubation, which means it is a little closer to market than most Microsoft Research projects, but not yet close enough to be available in any kind of early preview form.
“What’s also interesting about Midori is who is running the project. One-time Gates heir-apparent Eric Rudder is heading up the effort. Midori is being incubated under Chief Research and Strategy Officer Craig Mundie’s wing. ‘Everyone under him (under Rudder on Midori) is a multi-year vet, has a super fancy title, and is going back to their roots and writing code like they probably did in the old days,’ one Microsoft tipster told me.
“When and how Microsoft will roll out Midori is still a mystery. But it sounds like the company thinks the project is serious enough to dedicate a considerable amount of time/people/resources to it.”