Motorola USA has confirmed their list of Moto devices which will be soon updated to latest version of Android Oreo.The Lenovo owned Motorola has not mentioned the exact dates for the devices getting Android Oreo updates but might get updated by end of this year.
The devices which are eligible for Android Oreo updates are Moto Z, Moto Z Force, Moto Z Droid, Moto Z Play, Moto Z Play Droid, Moto Z2 Force, Moto Z2, Moto Z2 Play, Moto X4, Moto G5 Plus, Moto G5, Moto G5S and Moto G5S Plus.
Unfortunately, Moto G4 and Moto G4 Plus are not there on the list of devices which were launched in early 2016.All the above devices which are launched in the US are eligible for Android Oreo update there is no news about other countries when will they receive the updates.Also, note that the above devices will get Android Oreo Pending partner support which means that some of the above-listed devices might not get the updates even Motorola mention that device will get updated.