Could T-Mobile (U.S.) new global plan doom the global SIM card business?

[rfranzq]

Originally Posted by snidely

just wanted to report T-Mobile roaming is working perfectly in China.

That is good to hear.

In response to the original question.
Only for people in the USA with T-Mobile.
But it seems to be a really good value for them.
Will people in the US switch for this? Perhaps some.
Will non-USA people be able to get it? Not too easily,
although perhaps for some Canadians it will be worth it.

Will/Can any other american carrier match this?