I think the S4 is for people that missed out on the S3 last year and didn't want to invest in one several months after its release. Of course, people with S3s will upgrade as well, but this is for those people with 4Ss that want to switch to Android, but could not because the S3 came out almost six months after it.
If I didn't have a phone that was around a year old, the S4 would be great. Better camera, processor, features. But for an S3 owner, it really doesn't provide much of an upgrade. Nothing worth the hassle of selling your S3 and making enough to buy an S4 off-contract.
I know Masta said his Samsung from a few years ago was powerful enough for him, and I feel the same way about the galaxy S3 now. If the phone were to come out with a much better processor I doubt that I would really reap the benefits of it. The S3 is plenty fast for me and I can't see its hardware making me wish for a better processor or more RAM for at least another two years. I think the hardware is good enough that even cyanogen mod will be able to support it for a few more updates thus making it a solid phone to have until support wanes
If I didn't have a phone that was around a year old, the S4 would be great. Better camera, processor, features. But for an S3 owner, it really doesn't provide much of an upgrade. Nothing worth the hassle of selling your S3 and making enough to buy an S4 off-contract.
I know Masta said his Samsung from a few years ago was powerful enough for him, and I feel the same way about the galaxy S3 now. If the phone were to come out with a much better processor I doubt that I would really reap the benefits of it. The S3 is plenty fast for me and I can't see its hardware making me wish for a better processor or more RAM for at least another two years. I think the hardware is good enough that even cyanogen mod will be able to support it for a few more updates thus making it a solid phone to have until support wanes
I don't know a single person with the S3 complaining about the speed. Personally I do have the Tegra 3 in my N7 which is even a little slower and it maxes out only during app loadings, so that's the only aspect that would significantly improve for now. The S4's processor is literally twice as fast as the S3's processor (and that's for the slower Snapdragon version of S4), which makes it crazy future-proof, I'd say - in case someone comes up with some new, heavier features for Android in the future. Like a resource-heavier OS update.
The graphics chip is also more powerful but frankly, Android is still very poor if it comes to gaming and any high end phone is an overkill for games we see on Google Play. Mobile platforms are still lacking severely here.
Bigger and better Super Amoled, battery etc. are minor differences and sure they make this phone the overall best smartphone and are likely to make any new owner "wow" but if you had the S3 already the difference won't feel jaw-dropping because the S3 had similar things, just a little bit less awesome. It's basically like switching to a new model of Ferrari, already having last year's model.