According to MacRumors and 9to5Mac, 2018 will act as the year that Apple switches to Intel as the sole supplier of the cellular modems of the iPhone.
For the longest time, Apple relied on Qualcomm modems for the iPhone, but recent lawsuits soured the relationship. The upcoming exclusivity deal with Intel might last for a while, unless Apple negotiates with QUalcomm moving forward. Besides, Apple has a history of being reluctant to rely on an individual supplier. Of course, we see this with its diversified supply chain for components.
In terms of what this means for the end user, not much honestly. Things will likely remain the same, regardless of the chipset brand. Overall, the real challenge here involves Intel keeping pace with the upcoming Galaxy S9 and the Exynos 9, which promises accelerated cellular connectivity.