In China they will run it between Shanghai and Beijing, which is about 1200 kilometer. Currently it is either a 2.5 hour flight plus getting to and from the airport or a 4.5 hour high-speed train which starts and stops in the heart of both cities.

With the maglev the duration will drop to 2 hours. That is not trivial as you suggest. It is a genuine transport solution to counter the more polluting flights. In China people prefer the train over plane wherever possible. It is more comfortable, quiet and enjoyable.