If you read that link, there is no hint at anything to do with Windows on there at all. It's quite a short press release, it makes no mention of what might be

If you read that link, there is no hint at anything to do with Windows on there at all. It's quite a short press release, it makes no mention of what might be run inside parallels. I would expect linux to run, but Windows would be complete speculation. The link does mention an early access program.