As far as I can tell there are few, if any, noticeable changes as far as what is displayed on the screens. There are a few who have a warm fuzzy feeling that Bookerly was somehow magically darkened, but I see absolutely no change to Bookerly at all when I look at the screen nor when I take screen captures. Perception can be deceiving as people often see what they want to see. This appears to be a very minor, under the hood update.