When the iPhone 5S is unlocked, the touch Id sensor really should be able og launch Siri if u rest your thumb on the steel ring for the same time you would hold the button done to initiate Siri the way it currently is. It just seems like a no brainer. The steel rings purpose is to detect skin contact, the id scanner doesn't even need to be used for this function....similarly, double tapping the steel ring should launch multitasking....hopefully a future .x upgrade will implement this....I am worried about the home button breaking considering its serves so many functions and now contains very expensive hardware within.....I'm wondering how well the home button will hold up on the 5S...I know it's sapphires covered but I'm more worried about the actual clicking mechanism than the button itself