Maybe not the majority, but certainly many millions of people in all kinds of jobs could conceivably work remotely for a day or two while traveling by train and

Maybe not the majority, but certainly many millions of people in all kinds of jobs could conceivably work remotely for a day or two while traveling by train and lose less productive time than they would by taking a plane. Also, if we really had bullet trains that could do 200+ MPH, you could have cross-country express trains that take less than 24 hours, so it wouldn't even have to be multiple days.