In native apps mobile apps, there are some okay ad-blocking solutions.
But when the ads are baked into the operating system itself... I have a hard time seeing Microsoft or Apple losing the ad blocking battle.
So, instead of getting ads somewhat sandboxed inside a browser, in the future we may be getting ads inside the start menu, inside spotlight, on the toolbar... and instead of semi-directly funding content providers, the ad space will only ever be funneling money to the these same huge companies to spend as they see fit. Bleeech.