ievi :
Shotta06 :
Ok... So why either 4K or 1080P? There is 1440P
the scaling will not be good for my blu rays
Video is always scaled. Even if you're playing 1080p video on a 1080p monitor, it's scaled because video is overscanned. The video is enlarged to be slightly larger than the screen, and the edges are cut off.
https://www.engadget.com/2010/05/27/hd-101-overscan-and-why-all-tvs-do-it/
If you rip the Blu-rays and convert them to a playable media format, then the final product will be native 1080p. But the final product is still scaled, it's just that the overscan happened before the conversion process (otherwise you'll end up with a few lines of digital dots along the edges). So your 1080p video will essentially be a 1860x1048 or thereabouts source enlarged to 1920x1080. (Unless whoever did the conversion noticed that the overscanned areas didn't contain random dots and lines on this particular Blu-ray, and did a straight 1:1 conversion.) But if you're playing straight off a Blu-ray or DVD, then the playing software will overscan and scale it to slightly larger than your screen to hide any floating dots along the edges of the picture.
Anyhow, scaling of real-life scenes like video is mostly invisible. In 3D games, scaling can sometimes actually be helpful as it can act as pseudo-anti-aliasing. It's only the precise lines and fonts in computer UIs which don't respond well to scaling (especially if the fonts are using subpixel rendering).