I think it's obvious that 7-9 is just the first of a series of sequel trilogies and I'm not especially happy with this. I want the Star Wars saga to have a beginning, middle and an end, not just be a run of a mill summer blockbuster franchise that gets sequeled to death.
The more of Episode VII I see, the less I believe it will have deep connective tissue to the arc of the first six episodes. Instead, I think Episode VII will start a 6-film arc in much the same way Episode I did with Darth Vader. In that sense, Episode VII really could be considered a "reboot" after all: it's treating the previous 6 films as "myth" as a jumping off point, but re-shaping the conflict and introducing a completely new set of heroes/villains with different motivations under different circumstances.