I don't know. As far as I know there's likely no revision *or* planned 'magic fix' for this one. No I will not pay for a replacement of the same that will yellow again.
You laugh, but I still firmly believe that we'll never see a warranty or "in-place" fix. What will happen is, those with yellowing screens simply will have to suck up having bought their cars during an unlucky period of time.
We've heard six disparate methods in the last six weeks as to how they're going to fix this, with many saying it will only be temporary, and so far with no concrete timeframe.
With the MCU, I looked at it this way: "Do I want a yellow screen or not?" - You can have faith in Tesla if you want, but this "We have a revision, and I know we said we'd replace it but now we're not going to, and we might have a temporary fix someday but we won't tell you what it is, how it'll work or when it'll hapepn, so suck it up" response, by its very nature, is Tesla not being honest with their customers.
Which method are you betting on? Thermal? Liquid? UV? Tape? Firmware? One layer of glass? We really should have a poll, with 'none of the above' being an option.