Lenovo is already starting to sell them. SamsUng would have told you they are too expensive to produce until LG figured it out, just like they’ve figured out how to make sceeen from phones to TVs with real longevity. We’ll see about competition when it comes.
Nobody figured out burn-in or longevity with OLED. Sure, some companies may sell such products, that doesn't mean they solved these issues. It just means they don't care about those issues.