Not via OLED televisions, but:
Apple Watch Teardown at iFixitApple is using a flexible OLED display with a resolution of 272x340 pixels (290 ppi) in the 38mm watch and 312x390 pixels (302 ppi) in the 42mm watch. Apple is referring to it as a "flexible Retina Display". iFixit has taken a watch apart and examined the components here. They are not sure who is producing it but their best guess is LG Display. It is our guess, too.
Apple Watch Confirmed to Have OLED Display