[adinobro]

The problem with planes is that they have to carry all their fuel/energy and to carry it costs more fuel/energy.

Most high-speed trains don't carry all their fuel with them. They get it from the network.

This will all change as battery technology improves but at the moment I cannot see it getting better trains.

That being said I expect that the 1000km/h speed will be like the Shanghai to Beijing track that got up to maximum speed a few times for the record and has since been reduced to make it more economical.

Even if this does happen and the train reaches 1,000 for a single trip and then drops back to a safer and more profitable speed of 600km/h or 800km/h it is still faster than what we have now and is a massive improvement.