Will it be worth it to trade in my iPhone 4S for a 5S?

I've had the 4S for a while, and I'm trying to decide whether it's worth it to "trade in" my phone for an iPhone 5S.

I know it's probably irrational to be talking about this when the 5S isn't even out yet, but I'm curious as to what people think about this.

**Please no cell phone fan wars. They're *** stupid, and no matter how much you try to talk me into it, I'm not gonna waste my money to buy a whole new shining Samsung Galaxy S-whatever if my iPhone 4S works just fine.**

If you really want to, sure. Go ahead.
And HTC One ftw *trollface*

Probably, will be faster bigger and have better camera and better features, better to upgrade than to stay downgraded. I know you said that you don't want to be talked into it but I recently got a Samsung galaxy s4 on contract and I personally think that iphones have *** on these phones, they're so better and bigger! With an amazing 13mp camera. But its all about personal choice but yeah I'd defo say upgrade! Although the new iphone5s will probably be $/£500+ and you'll barely get 200 for an iphone 4 I think anyway there's some cheap contracts out there

IPhone 5s is much strong than iPhone 4s. Why not trade if no extra cost?