I can do you one better than that.
I own the new Air, well I gave it to my wife now. For my personal use (my review is here somewhere) the brightness was not at all an issue for me, I usually don’t use computers in bright rooms and I naturally prefer a dark screen. So the Air, was 100% usable for me.
I am however talking from an unbiased position when I criticise the screen. Given the price of the machine, I can’t see why it can’t at least equal a 12” MacBook. If they gave 6GB RAM instead of 8GB, the machine would still be perfectly usable for most people too, but if Apple made that decision, I would also criticise it.
You may only notice that the colours are worse if you compare it to another, but just because you are not noticing it doesn’t mean you are not getting a compromised experience. You might also not notice if your machine was faulty and was refreshing at 50HZ instead of 60HZ, but it still is an inferior experience.
The screen may have worked for me but it isn’t a value for money screen - and it also means the screen is no longer satisfactory to other people who would otherwise would be satisfied if it at least met the 12” MacBook standard. The screen would have also worked for me if it was a 250 nit screen, or a lower resolution - it goes back to what the competition are offering and the value proposition of the machine.
I am not sure why Apple chose this path. I can see why they chose the 7W processors but not the screen choice.