I want to know the answer to the following question:
What apps can one expect the People app to match with?
All the background I'm provided with is that "Apps can also provide integration with other services; for example, the People app can connect to a variety of different social networks and services (such as Facebook, Skype, and People service), while the Photos app can aggregate photos from services such as Facebook and Flickr.". Is that enough to answer the question?
Answer: yes