Yes, but the question is whether Web Components is needed.
Needed to turn the web into a solid application platform with good support for composition and code reuse? I'm going to say yes (or if not Web Components then something that facilitates better scoping of code and CSS).
Of course, not everyone wants to see the web-application model become too powerful...
Is that directed at Apple? Because they have had the most powerful mobile web engine for years -- and they continue evolve their desktop one. Heck, the gave us stuff like Canvas and CSS animations.
Nope, they never supported flash in mobile in the first place. And they continue to do so today, years after Flash has been dead and burried.
If they hadn't added canvas/video etc to HTML and there was no way to do half the things flash did, it would have been trumped by Android and their mobile flash player.
That's funny, since when the iPhone first came out, Apple claimed there wasn't gonna be a native SDK, and developers would just write all their apps in HTML.