4k has 4096 by 2160 pixels which is nit 4 times HD
Uhd1 with 3840 by 2160 is 4 times HD
.
If you just replicated the extra pixels you end up with the same static resolution as HD was a UHD 1 screen has 4times the number of pixels.
So the UHD 1 screen would look like an HD screen at the same size.
If it interpolates it will add information which was not there in the signal but will make the picture look closer to the original scene.
Uhd1 with 3840 by 2160 is 4 times HD
.
If you just replicated the extra pixels you end up with the same static resolution as HD was a UHD 1 screen has 4times the number of pixels.
So the UHD 1 screen would look like an HD screen at the same size.
If it interpolates it will add information which was not there in the signal but will make the picture look closer to the original scene.



