Webkit is nice but not groundbreaking. Their GUI work isn't much better than the competition, although I do hope SwiftUI goes somewhere...
So I listed 3 products (should have been 4 products) that changed the world, but the meh is not for those (they were quite good!). The meh is for a return to 1990s Apple. Most of the existing technologies have largely plateaued and are being pushed ever higher in diminishing return increments (battery life being the final frontier). Without a product visionary, this is where we'll be for awhile.