At a conceptual level, it does have many advantages. For one thing, it's just part of your phone, you never have to install anything. You don't have to market i

At a conceptual level, it does have many advantages. For one thing, it's just part of your phone, you never have to install anything. You don't have to market it to anyone, it just automagically rolls out through the world as people buy new devices and carriers adopt it. But I'm concerned that the intransigence of carriers, especially those that operate in non-competitive environments, will get in the way of rolling it out properly and effectively.