This is fine if you have a 1080p monitor. I was impressed when this first happened to me, now on an ultrawide monitor it’s back to being not great.
I do recall my last motherboard had an option for a splash which was centered in a black screen, so you could basically display it at native resolution with no stretching and it would look great and seamless. I wish every motherboard had that splash option now.
Ha, back in the day when I was a student assistant in a campus computer lab, we flashed the BIOS boot screen with a full screen image of Darth Maul. The staff person who oversaw us was not amused. (This was in the Pentium 3 era IIRC)
I do recall my last motherboard had an option for a splash which was centered in a black screen, so you could basically display it at native resolution with no stretching and it would look great and seamless. I wish every motherboard had that splash option now.