Welcome to the iMore! The 5S is amazing device. Please take some time to check out the 5S forums. I also suggest that you go to an Apple store or your carrier store to see the device for yourself. Again, welcome to iMore.
Welcome, fingerprint sensor, A7 chip first 64-bit smartphone on the world, M7 coprosessor,iOS7,fast as ferarri, isight camera, facetime,retina screen.just anything you want and need
I can tell you this much, there is no jailbreak for the 5s yet because the 5s came with iOS7 and there has yet to be a jailbreak made for that iOS. Jailbreaking your iPhone allows you to theme, tweak, and customize it. We have forums here on jailbreaking so perhaps you can read up on it so that when the time comes to jailbreak a 5s you will be familiar and know whether this would be something you want to do or not.