It just looks like second-class integration to me, something to appeal to cross-platform projects that want to easily run their tests on Windows, but nothing serious for pure Windows devs. This is nice for open source projects, but it means for them that they have to pay a lot more for resources, without having increased their target user base to get more revenue. They're missing an opportunity.
It feels sort of like they are just “coasting” on their past momentum. It’s clear they aren’t, since they are doing things, as this very blog post attests, but not the sorts of things people profess to want.