For me it's unbeatable for games, but I don't find it so suitable for the office because I don't like the white colour.

Same situation for me! I've been using the monitor for a month and so far no "burnt-in" pixels. It also has a pixel cleaning function. I read somewhere on the net that you should take a short 15-minute break after 4 hours of work. I don't know how true this is, but I don't mind following it preventively. There's not much to say about gaming, HDR simply makes the picture super sharp! Films and 4K images look incredibly realistic. As for work, I just have to get used to the text size. The ROG as a 27-incher is very similar in physical size to my old 24" 1080p, and at 1440p the text gets slightly smaller (I use both monitors at the same time). You can read it without any problems, but I only have to adjust the text size when I drag text from 1080p to 1440p. Otherwise, the screen is really great. I can only recommend it!