That was the case for the 996/997, which was basically the same car underneath. It's pretty much a non-story really, and I don't know why all the big guys are running it as 'news'.
In 3/4 years time you'll get the 991.2, and then three years after that the 992.1, and then 3/4 years after that the 992.2 so it's pretty straightforward really. Besides, having made such a huge investment into the car you'd expect any manufacturer to try everything possible to extend the life of the product: Some will sell the chassis to others or move it between brands in the same group, but as the 911 is unique in construction they'll just put a prettier body on it and re-work the engine/interior/suspension setup. Easy as that.