I haven't tried Amazon prime video or Netflix in hdr but if you watch videos, it will be vivid without the need of a 4k display.
What are your concerns with the bezels? To me, the overall size and feel of the phone is what matters, with or without bezels. I was using a compact phone before this so I'm just getting use to a slightly bigger phone. Now though I can say that I'm enjoying the screen size. I think this might be the sweet spot for me. I will say that the build quality and thinness gives you a real feel of quality compared to all the glass phones being pumped out imo. Love the square design as well. Just feels premium or "executive" so to speak.
The screen has 3 saturation modes. I have it in the middle and the screen is bright and sharp.
I'll add that the plus with Sony phones is that they are very stockish. No cartoonish look like LG and no lag like Samsung. Negatives would be the Camara in low light. All depends on what you like but I would certainly try the phone out if you're interested. You can always return if it doesn't float your boat.