This could be interesting for people to get into OS development, or assembly development, or embedded development (although its embedded applications are likely slim to nil due to it being x64-only).  I don't believe they intend for this to ever be a real OS (and they plainly say that it's not at the moment), so I don't think their time really factors into it.  Personally, I think there are better ways to achieve the goals I listed previously, but if this helps get someone into low-level development, I'm all for it.