If you really can't see it, then my comment wasn't directed at you.

My comment is for people who see the problem, but intentionally say there is nothing wrong with it, or prematurely say it after giving it a cursory glance.
Some people don't have high enough resolution monitors, and some peoples' vision isn't acute enough. So I guess it can be a legitimate problem of not being able to see it.
Most ipad's have a bookspine effect wherein the left edge of the screen has a dark shadow. I've seen this on 2 ipad airs I've owned, and one rmini ipad at the top of the screen. My newest ipad air has it on the left, but one inch right of the left edge.
Many ipads also have this problem accompanied by a yellow gradient, shifting from yellower on the left edge, to cooler towards the right.
OP's ipad is unique in that it looks like it is cool on the left, and has a hotspot of "warm" or "yellow" right where it says Nexus TV. It seems more prominent at the top, and gradually fades down to the cooler color at the bottom (although still not as cool as the left side). First time I have seen one like that.
I would say if you have an ipad air, and can't see anything, just enjoy it. I would pay money to not be able to see these real problems. Because of my profession, I've been trained to pick up on tiny details, and I cannot unwire that trait from my brain.
I don't think this will affect anything else (i.e. I don't think the screen will die later because of this) so it is really one of those things where it is better not to look.