What part of that page indicates that you can't use the platform like that? They just say "more control over how apps run in the background".
Presumably you can still give your users a good reason for why you need to run uninterrupted in the background and they can approve it similarly to how they now approve other permissions.
The way this is implemented is that the system will kill any background services your app has after a grace period, just like iOS. In order to have a background service that "good reason" equates to a persistent notification in the tray and icon in the status bar--which nobody agrees is a good product experience.
