1. Certain standalone authors had that strength. Stephen King certainly did in the 80s-90s.
2. I think this is why certain fiction series tend to have very strong followings. Regardless of the HBO Series, people were hungry for "Dance with Dragons" when it came out.
The internet certainly helps with TV series. Much of the popularity of "LOST" was the skillful manipulation of that popularity by the production. Compare "LOST" with "Heroes" (poor quality rapidly squandered popularity) and "Firefly" (utter failure to leverage the growing fandom.)
They are uniformly excellent. They are distinguished by their honesty and lack of posturing.
For instance, this piece addresses how changing reading habits (more short intervals of time, possibly interrupted) are changing how we can appreciate longer fiction:
http://www.nybooks.com/blogs/nyrblog/2014/jun/10/reading-str...
And here's a great piece on reading parts of books -- even excellent books -- putting them down when you've gotten enough:
http://www.nybooks.com/blogs/nyrblog/2012/mar/13/why-finish-...
Hmmm… I thought that the point being made there wasn't so much the serialisation, but the delivery mechanism. The newspaper then, and the television now, is in everybody's home. It's not something special that needs seeking out.
There are some exceptions. Something like Game of Thrones comes close--at least among certain subcultures and groups. But it's much more diffuse and less immediate.