Has the Sarah Conner Chronicles been picked up for another season or are the producer's going for this as the series finale with the chance that the series has been cancelled?
It kind of wraps things up in a certain way that leaves the folks watching via DVD boxsets with a fairly satisfying conclusion that ties it into the original two movies as best that it can. Although having a 16 year old John Conner leading the resistance isn't exactly the most believable scenario.
I guess alternatively if the show does get picked up for a third season, they can have 16 year old John Conner return from the future with new insights and determination to stop the future.
Still leaves an open question about what the deal is with the "good" liquid metal Shirley Manson Terminator, and what purpose she had for "birthing" John Henry.
Ending did have an odd kind of Wizard of Oz vibe going on with Derek and Cameron/Allison waiting there in the future. Not to mention the Field of Dreams thing with Kyle Reese.