Unfortunately, the report doesn’t provide any additional details about the chip, but it is speculated that the standard iPhone 14 models will be equipped with an A15 chip with a five-core GPU, which provides up to 25% higher graphics performance. In the standard iPhone 13 models, the A15 processor has a quad-core GPU.
Most likely, nothing will change except for the graphical capabilities. Only iPhone 14 Pro models will receive the new Apple A16 processor.