What are you talking about? Android phones are sold everywhere that iPhones are sold.
Play your purchased iTunes movies locked with Fairplay DRM?
Read your purchased iBooks?
Read your personal documents, passwords, and data locked into iCloud?
Synchronize with your other Apple iCloud-only devices?
At some point, product tying results in lock-in far more costly to escape than, say, a video game console with platform-only titles.
TiL