For years, TV ratings data has revolved around a small number of households using specialized gear to track their viewing habits. That's not completely representative of what the broader public is watching, is it? However, the accuracy is about to jump by leaps and bounds. Mere months after a deal with Dish, Nielsen has forged a multi-year agreement with AT&T to use set-top box data (thankfully, anonymized) to help determine ratings. Info from DirecTV and U-Verse subscribers will supply Nielsen with large-scale viewing patterns on top of its existing samples, providing a clearer picture of the American TV landscape.