The same stick that some use to beat iPhone fans still exists: yes, visually this is almost identical to last years redesigned iPhone 6, with the same ceramic metal feel and slightly protruding camera that means you can place it side by side with the iPhone 6 and not really notice the difference.
Now onto the biggest change for the iPhone 6S, 3D Touch. This changes everything for Apple users, and while its not enough of a reason to upgrade from the 6, its a pretty nifty trick that again promises to make current iPhone 5S owners feel like theyre getting a real upgrade with their new phone.
The main difference 3D Touch brings is the ability to interact with on-screen instructions in different ways. Its too early to delve into all the ways that the new power will work, but the system(for those that havent seen an Apple Watch or the new Macbook) is simple: you can tap like before, but press a bit harder on an icon or message and youll get a new menu popping up.
Imagine its like right-clicking the mouse to get a secondary menu, and youre pretty much there. Its a cool new feature, although one that app developers will need to work with for a while to really get the best out of.