China is backing off their high speed maglev trains. While it is possible to make maglev go that fast, wind resistance means it is far to costly. A large airplane (because it runs at 30,000 feet) is not only faster, it uses less energy.

If vacuum trains ever happen, then things change. However those are very expensive to build, and have safety issues. We can solve the engineering problems with safety, but the expense doesn't seem possible)