The related part of the list says:
More locally relevant predictions in YouTube. [project codename “Suggest”] We’ve improved the ranking for predictions in YouTube to provide more locally relevant queries. For example, for the query [lady gaga in ] performed on the US version of YouTube, we might predict [lady gaga in times square], but for the same search performed on the Indian version of YouTube, we might predict [lady gaga in India].
Clearly better suggestions/predictions for YouTube users is an area of interest Google is very focused on these days.
“For example, if a user is signed in and searching Google for cooking recipes, our current privacy policies wouldn’t let us recommend cooking videos when she visits YouTube based on her searches – even though she was signed into the same Google Account when using both Google Search and YouTube,” Google said in the letter.
The connected living room is becoming a reality for more and more people, and YouTube is still the big kid on the block for online video. It’s going to be more important than ever for Google to keep users not only coming back, but keeping them on site for as much time as possible.