No, you're not imagining things: according to IGN, Marvel Studios has just signed a deal with Netflix to create four separate series based on Daredevil, Luke Cage, Iron Fist, and Jessica Jones.
(Note: that's Jessica Jones, not Jessica "Spider-Woman" Drew.)
The four series, which each have a minimum order of 13 episodes, will then lead into a Defenders miniseries that sees the heroes team up.
Now is a great time to come in and catch up with these heroes. The current Daredevil ongoing is a terrific book, Luke Cage is in Mighty Avengers, and we have the Alias trade paperbacks that introduced Jessica Jones before she became a big star in Bendis' Avengers.