Ha ha Midori. I was working on the Windows divison when Midori was a thing. It was yet another Microsoft Research dead end project. It wasn't cloud-based, it was supposed to be "provably correct" code. So we'll futz around with a new language, new OS concepts, etc. It'll be cool, we'll write some academic papers about it.
Oh, this is costing a lot of money to pay the salaries of the people working on it? Oh, you want to "productize" MSR research, so it's not just a money sink?
Well then, instead of saying Midori is - charitably - a test bed for new OS concepts and languages - we shall say it's the "future of operating systems at Microsoft". You want backwards compat with Windows? Oh, sure. You want a new browser that's "provably correct"? Sure we can do that too, with a couple dozen people while the Windows division has 5000.
Nobody was scrapping the Windows OS in 2008. The Windows division was in the middle of Windows 7 development in 2008, and Win7 RTM'd on July 22 2009.
Midori fooled around with demos and the like for a while, then went away. It never got past proof-of-concepts and academic papers.