It's an honest concern for many, however we have a few laptops, including the Alienware 13 that have had OLED and have been in users hands for a few years now. In fact some of those devices, now a few years old, are STILL better looking and preferred for use over newer machines just because of those OLED panels.
So I agree with Asus, there are things we need to "see" how they pan out over a few years to come. However, what we have seen so far is very positive. So wait and see if you are worried, but I think we're likely to be pretty satisfied over time. Remember it's not like laptop LCD's are exactly the picture of color accuracy now. They have weak contrast ratio's in many cases and the color palette (let alone HDR) they can reproduce is often limited. Some panels do better in those areas, but then they cost almost as much as OLED. Color changing over time happens to LCD's too, particularly in high gamut LCD's where the backlight has been enhanced to display more spectrum. So let's see. But in the meantime you'll get far greater response time in most cases and contrast ratios that your eyes will thank you for.