Henry Jenkins says, in the Introduction to Convergence Culture, "This book is about the relationship between three concepts -- media convergence, participatory culture, and collective intelligence." He then defines the terms and, a few pages later, still in the Intro, writes, "My aim is...modest. I want to describe some of the ways that convergence thinking is reshaping American popular culture and, in particular, the ways it is impacting the relationship between media audiences, producers, and content."
In contrast to McLuhan who is bold to a fault in Understanding Media (read just before Convergence), but bold and not afraid to be wrong, and that's important. Jenkins aims low, way too low. "Modest" here translates to not trying very hard. His few pages on Wikipedia are very good indeed (he's a proponent, so am I). But otherwise, from Convergence Culture one learns:
1) people get information and entertainment from a variety of media,
2) people can get the same information from a variety of media,
3) fans are passionate about their TV shows and classic popular movies and books and some like and utilize spoilers,
and, repeatedly,
4) the program he directs at MIT studies these phenomena.
Sorry, that's not enough for me.