Wikipedia shows us that ~50% of Apple acquisitions result in a product, or an enhancement to an existing product.
https://en.wikipedia.org/wiki/List_of_mergers_and_acquisitio...
https://en.wikipedia.org/wiki/List_of_mergers_and_acquisitio...
The others are scheduled for upcoming products. LuxVue for example is widely predicted to be the basis for the new iPhone 8 screen. PrimeSense, Perceptio, Faceshift are all part of Apple's upcoming AR push.