Why isn't there automatic updating in Windows 8 store?

I've been using Windows 8 on my PC for some weeks now and one thing i can't get around is how there doesn't seem to be automatic updating in the app store. That's what i love about Android - allow automatic updating and the phone will mostly take care of it from you and you simply have to swipe the notification away once the deal is done.

Is there some good reason why my PC can't just handle updates by itself?