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Apple Hits a Major Roadblock as EU Targets App Store
(www.wired.com)
This is a most excellent place for technology news and articles.
You know, this explanation isn't wrong, but having a printer manufacturer in your analogy show up as a victim just feels wrong.
That's just the first thing that came to mind. Any product with consumable refills (razor blades, electric toothbrush heads, air/water filter replacements, etc.) would also work as an example.