It makes a lot of sense for Intel to do this. Now Thunderbolt will be everywhere and Intel is uniquely positioned to take advantage of the technology early on. They already have CPU silicon in the works that will integrate Thunderbolt, so it is going to be super easy for Intel to take advantage of USB 4.0 early on.
The spec releases in Summer 2019, so devices won't ship until way after that. Earliest we will see this is with Ice Lake in 2020, assuming Ice Lake is on track.