Will the iPhone 4S (or 4) get iOS 7 or even iOS 8?
I'd like to think that they'd support it up to iOS 7/8 or so because that seems to be the trend (2/3 years of support)
Welcome, I've been used to this for 3-4 years now - iPhone 2G not getting iOS 4, iOS 4 running like crap on the 3G....
Remember how Apple works.
It will get the small new features of iOS 8, just like the iPhone 4 only got the small stuff of iOS 6.
It wont get the full package. Probably not even the half.
It's missing turn by turn and flyover from maps. Also panorama photos, and Siri, as you mentioned. Turn by turn and siri are pretty huge, at least IMO. If I'm not mistaken, there is also no FaceTime over 3G. I could care less, but it might matter to others.
I'm aware they no longer sell them, but I thought the 3GS was still receiving updates although I do remember something about it getting a final update a while back.