If the iPod is anything to go by, good luck. The price Apple pays to be allowed to play in these spaces is DRM for media, walled gardens for telephony. And it's a price they are probably happy to pay as it justifies tie-ins like iPod/iTunes Store.
Apple has justified its closed systems with the benefits of a unified user experience. There's something there, but as the enclosed area becomes larger, the justification is increasingly suspect.
The fact that these enclosures are associated with businesses that have not distinguished themselves for their innovation and openness makes this direction especially worrisome. Apple's new niche will be fashion designer and toll collector for oligopolies.