Apple focused on hardware upgrades over design developments, following the pattern Apple has long established: significant changes come in the even years and incremental updates in the odd.
Apple added a new colour called rose gold for the new iPhone 6S. This is the only visual changes you'll be able to detect compared to the iPhone 6.
Apple says that its phone may look the same as last year's model, but its iPhone 6S duo has achieved more inner strength. This time it uses a different grade of aluminum for its chassis, one that's also used in the aerospace industry.
Apparently, a new type of chemically strengthened glass is used for the screen.
Apple has included a variation of Force Touch, which you find in different capacities on the Apple Watch and on some Mac trackpads. Called 3D Touch here, the iPhone 6S phones will adopt the same pressure-sensitive capability that calls up secondary menus and actions when you press and hold the screen.
The biggest news here is the upgraded front and rear cameras and video capability, but there are a few other tidbits here and there as well.
A 12-megapixel camera is a huge jump for Apple, which has been holding onto its 8-megapixel sensors in its iPhone for years. Autofocus will pick up the pace, according to Apple, and colour accuracy is a point of pride.
The 5-megapixel front-facing camera now brings the iPhone 6S on par with a lot of today's competing handsets.
The second-generation sensor promises to snap open the phone faster than before. Hopefully fingerprint authentication will also speed up.
Under the hood, we have an upgraded, proprietary A9 processor third-generation 64-bit chip. Apple claims that the A9 is 70 percent faster than last year's A8 when it comes to the usual computing tasks (like opening an app, for example), and 90 percent faster at graphical tasks, like gaming.
Faster LTE, Wi-Fi connections
Apple says it'll have the fastest forms of LTE Advanced, if that's supported where you live, and will also include support for the latest, greatest Wi-Fi networks.
The two new iPhones will run on iOS 9, mining all of those software enhancements, like a smarter Siri and up to three hours longer battery life, plus a new Low Power Mode. The updated operating system, which is currently in public beta, will arrive for phones on September 16. Meanwhile, read our full rundown of iOS 9 here.
Availability: Pre-orders start September 12, available from September 25.
Apple claims that the processor is up to 70 percent faster than the previous iPhone, and the graphics performance is up to 90 percent faster. Real-world performance remains to be tested.
Apple also launches an iPhone subscription program: