I'll never forgive them for killing off Hicks though...
At least The Matrix was awesome, and the sequels tried to be smart.
Plus, the last ten minutes or so were very emotional - I couldn't believe it when Sarah backed out of the time travel sphere thingie! And I couldn't believe it when John didn't. Then we see Derek - then Kyle and Allison! Whew...overload!
I still want to know what's up with the HK, John Henry's "brother", etc.
I think the show can continue because we can still have a storyline with Ellison and Sarah in the "present", taking care of Savannah and possibly continuing Zeira Corp.'s plans, fighting against Skynet's creation and seeking out the faction of people creating Skynet. Plus, they left a huge plotline open with Dyson's son. Then we can have an additional timeline with John in the future, helping the resistance with Weaver.
However, I see John eventually returning to the past because if Sarah and Ellison change things, how can John's current "future" have any meaning?
My brain hurts. In a good way.
Cameron had to play dumb in front of John so he wouldn't figure out what she was going to do (and probably try to stop her).