Once the press gets a hold of it, and it disuades potential MBA buyers, apple will absolutely listen.
No, if Apple loses potential MBA buyers, sales will go down, and they will just cancel the MBA line. This is in addition to them losing money to people on this forum returning their MBA 4-5 times.
The lines issue is overblown. I have the horizontal lines but I can only see it at a very extreme angle (my chin on the trackpad with display tilted all the way back). If it weren't for this forum, I never would've noticed it. Hell, if I had a MB, I wouldn't be able to see anything at that angle, much less horizontal lines, because the screen is so bad.
Apple says it is "within spec" because it is. It's not a flaw and they will never fix it. All this whining does is scare potential buyers who don't know how irrelevant the problem is. "Horizontal lines across the entire screen!" sounds horrible until you actually see it in person. Then you realize it's no big deal and I'm someone who's incredibly OCD about my displays. I get every TV in my house calibrated every 12 months by an ISF certified technician at $400 each. I annoy my friends constantly when they come over to watch a movie and I break out the color meter to make sure it's perfect. I manually focus my 1080p projector every time so it's always razor sharp.
Yet I had no problems with my MBA. If Apple offered to fix it for $10, I would keep my money. That's how irrelevant it is to me. In fact, the screen is the only reason I bought a MBA instead of a MB. The MBA screen is the BEST among all 13" laptops (although I would've preferred a higher resolution. 1080x1200 on a 13" would be sick.)
If Apple drops the MBA line, I would be forced to go to the much heavier MBP and that would suck. Someone wrote in another thread "go to a light solid color desktop and tilt your head up and down until you see the lines". I say, you can either enjoy your beautiful screen with deep inky blacks and vibrant colors. Or you can spend every day changing to a light solid color desktop and tilting your head up and down until you see the lines. Which sounds more fun to you?
D