May be old news, but I spent some time at my local Apple store comparing my screen with the store display models. Just wanted to post my thoughts for fellow "OCD about screens" folks (myself included). As many people on here have observed, the display units in store, far more often than not, look whiter than the screens you walk out with. I decided to calibrate my rMB with an X-Rite ColorMunki Display colorimeter and then visit a store to compare. Also spent time with a really cool genius who is the go-to in that store for display questions. Fun pre-football Sunday morning. My model has panel type A028. We brought up my serial number, found out it is a Samsung display. ALL of the floor models (I looked at two separate stores over last 2 days) are panel type A027. We didn't check the system for that display type. My display isn't yellow, it's just much warmer than ALL of the floor models at 2 separate stores. I have mine calibrated to 6500K via the latest X-Rite software. Side by side with 4 other MacBooks today, setting my display to 7000K in the color sync utility w/in Sierra, makes it look 100% identical to the floor models. TLDR, there isn't anything wrong with your screen if it is much warmer than the floor models, in my humble opinion. I firmly believe, just like TVs at Best Buy and every other store, the display models at Apple are all factory set to run cooler because that is what people like to see versus warmer displays. I trust my colorimeter's accuracy re: white point. It is the Apple store floor models that are set too cool, not flaws in our MacBooks. Setting your warm display to 7000K should make yours look like the floor models. One thing I didn't do and prob should have done, was adjust the color profiles on the store display models to compare alleged identical profiles. But I don't believe if you have a warmer display that it is cause for concern / reason to put yourself through the exchange lottery. Carry on...just wanted to post my thoughts for those who may care.