Apple has finally confirmed what we've all been talking about for ages. It has unveiled the iPhone 6S and iPhone 6S Plus smartphones, with a new rose gold aluminium finish joining the space grey, gold and silver models like the previous generation.

However, they are very different to what we already have.

"While they look similar, we have changed everything about these new iPhones," said Tim Cook. "They are the most advanced smartphones in the world."

As before, the screen sizes are 4.7- and 5.5-inch respectively, but one of the key new features is the previously rumoured 3D Touch Force Touch-style technology for the screen itself. It provides three levels of finger pressure: the original tap like before, plus what Apple calls "peek" and "pop" to give more distinct effects when different pressures are applied.

The new phones come with a 3rd-generation 64-bit A9 processor. Apple claims that it is 70 per cent faster than the A8 chip in the iPhone 6 or 6 Plus, and 90 per cent faster with graphics processing. This gives it the best games-playing abilities for an Apple mobile device ever.

Games can also use the 3D Touch pressure tech to aid controls, depending on developer support.

Other new tech includes always-on Siri thanks to the M9 co-processor being built into the processing chip, and the Touch ID fingerprint sensor on the front is more sensitive and accurate than before.

The camera on the rear is also new, being a 12-megapixel iSight camera, up from the 8-megapixel module found on the last generation. Plus, as well as record in HD for video, it is also capable of shooting 4K footage this time around. It can also be edited in iMovie on the phone itself.

The front-facing camera is now 5-megapixels for selfies and the Retina display backlight works as a TrueTone flash, as found on the rear.

Another new camera feature is Live Photos. Much like Nokia provided with Lumia phones in the past, the photo can be accompanied with a short clip of video so when you press on a photo on the screen using 3D Touch, you see them move. You don't need to do anything different, just take a photo and the Live Photo mode is on by default.

The new iPhones come with 23 bands of LTE built in so it should work on 4G networks worldwide without localisation technologies needed.

Prices will start at the exact same prices as they did when iPhone 6 and 6 Plus were released, same configurations too. In the US that starts at $199. And both phones will be available for pre-order from this Saturday 12 September, for shipping on 25 September in the US, UK and other major countries.

The new iOS 9 will be available for other handsets from 16 September.