High-Entropy alloys are now 15 years old, and numerous investigations have been extensively made for understanding of various fundamental aspects, basic properties measured in materials that need yet to be controlled, and oxidation resistance. Many agree to state “such excellent properties” implying that select HEAs possess beyond-superalloy high temperature (HT) structural application potentials. On the other hand, objective assessments have yet to support such beliefs. This presentation evaluates the HT application potentials of HEAs in that available mechanical properties are compared with those of current engineering alloys (superalloys and gammalloys) and also against applied stresses required for operating rotational components. The so-estimated service temperature limits for HEAs will be adjusted considering/integrating expected/required engineering microstructures and critical oxidation resistance data. HT structural application possibilities are then evaluated and determined for both low-density and heavy refractory HEAs, which will help steer or specify the HT HEA research and development directions.