You have to remember, the future you saw in T1 was 11 years LATER than the future we saw in T4, which is plenty of time for all the nice hardware and vehicles humans had to be destroyed, and for humans to be in a worse situation such that they were hiding (literally) underground and shit. You assume that every military vehicle and weapon would be destroyed in a limited (I say limited because if *all* nukes were launched the planet wouldn't harbor life, and the sky would be full of debris) nuclear war, yet you must be forgetting the large amount of national guard armories we have - Washington state ALONE has 21. And that's assuming that's all we have because all bases and storage facilities are hit.
I understand that TS scenario is plausible but like in star wars, the technology looked like it downgraded through time, which is quite odd.i know it's the problem of making prequels decades after the original movie(s) due to better technology and special effects techniques but in TS ,sam worthington looked like a better, more advanced infiltration unit than arnie in T1 ,imo.
But the most important thing is that since T1, we all wanted to see a terminator movie in the future, with the war that kyle pictured it. That is why TS was a big disappointment (among other things).
I think now it's too late to make a prequel before arnie and kyle are sent back to 1984.for me that would be the most interesting story because you would see the war scenario we all wanted to see, watching kyle growing up, t-800 being made and perfected, john connor becoming a leader and ,like kyle said, they (humans) won so there is nothing more to tell after that.
Why is too late? Michael biehn is too old to be kyle reese again (for me he's the only kyle that matters), arnie is too old to play T-800 for the 4th time (that TS cgi attempt was laughable) and cameron is already fed up with terminator (the only capable director to make anything good out of this saga).
In my mind, i think it would have been better that T2 was the movie in the future and not the same time travel routine from T1.