It just seems the OLED burn in problem will never really be solved, only delayed.
May be WOLED will one day become good enough, the Joint research from Google and LG shows WOLED was capable of much higher PPI than what we have today, but the brightness just aren't good enough for Phones and Laptop usage. So WOLED will still needs to increase PPI, Increase brightness, reduce power, all while trying to delay burn in. I don't see that happening in 3 years time.
MicroLED is still at least another 5+ years before happening on phones or laptop. LCD, or QLED LCD is the best we have got at the moment in terms of longitivtiy.