Hold onto your Dragonglass, because we definitely haven't seen the last of Gendry.
While he may still be recovering from Arya's engagement refusal, the new Lord of Storm's End is probably going to play a huge, very crucial role in episode five of Game of Thrones.
According to the Reddit theory posted by user vir804 that's been gaining tons of steam since last night's sh*tshow of an episode, "The Last of the Starks," Gendry will heal his rejection wounds by putting his blacksmith skills to good use.
Specifically, the theory states the last living Baratheon will fashion a suit of armor for Dany's last remaining dragon, Drogon, so that the dragon is completely indestructible. Even with the Scorpion weapon that Euron used to shoot down Rhaegal in episode four, the Greyjoy fleet and Cersei's Golden Company won't be able to penetrate the Baratheon-made suit of armor that Drogon will wear into battle in episode five.