The much anticipated Fornite Mobile for Android will require a fairly powerful smartphone to run. The minimum requirements to run the game were found by XDA Developers while querying the entitlement API. Based on the resulting JSON output, an Adreno 530, Mali-G71 MP20, or a Mali G-72 MP12 or higher GPU is needed.
https://www.notebookcheck.net/Fortnite-Mobile-for-Android-requires-a-fairly-powerful-smartphone.320856.0.html
I hope it will run well on the Nvidia Shield TV, especially since the Nintendo Switch has it (same X1 chipset)