Man I think you're talking about resolution, as I said, the final output is 1920x1548. For quality I meant the image itself: composition, render, lighting and modeling. I'm working on 1920x1080 monitor and it looks completely fine. The images are intended for banners, headers and decoration for cryptocurrency post (I don't think bigger images work better in those cases). But for others purposes like wallpapers and backgrounds you're absolutely right. As soon as I have some free time, I will upload links with higher resolution images.

Thanks for the advice.