Singularity is an operating system research project. It’s a team of smart people who were told “what might an operating system look like, if it was designed from the ground up for dependability”.

People on pop forums like Slashdot and OSNews have been wishing for years that Microsoft would throw away Windows and start from scratch, to address problems like reliability and malware. Usually their wish revolves around rebasing Windows onto some form of UNIX, but that’s a crap idea and wouldn’t actually achieve their wish at all. If you want to address problems that are caused by fundamental design decisions, you need to revisit them. This is what Singularity does.

Part 1 | Part 2 | Part 3 from Mike Hearn's blog