Big deal. This is the first time that viewership from any of the new streaming services has counted in traditional TV ratings.
Small impact at first. The only ads from Hulu and YouTube that will count will be the ones that are exactly the same as on live TV
Nielsen also announced that they are adding viewership from video-on-demand (VOD) for 9 networks into their content ratings:
1) Adult Swim
2) Cartoon Network
8) Music Choice