For demonstration purposes, check out the official video trailer for the 747 Immersion below.
Keep in mind, both products are compatible with Prepar3D V4 only. Moreover, the PMDG 747 package supports the base level Queen of the Skies II as well as the 747-8 expansion.
To learn more about OldProp and other available products, visit the developers website.
*Video and feature image courtesy of OldProp.