According to rtings update, many TV's suffer from a software glitch where they are not running their OLED compensation/optimization routine. (Sony seems to be really bad at this and makes it quite difficult to remedy) When they are run, most TV's do NOT have burn-in.
Also, looking at the LCD burn-in, you see MUCH more burn-in effects.
Finally, unless you are running static images on your TV/phone/computer, the burn-in effects seem really minimal. What was surprising was outright failures of the panels, especially at the higher-end. Their conclusion says this makes sense since they push the limits in terms of power draw/nits/brightness/etc.
They haven't had enough data for computer displays yet to make a conclusion. They are much more likely to see burn-in effects though due to taskbars/menus in software.