There are a few countries in the 21st century that use powerful electromagnets to build high-speed trains, called maglev trains. Such trains float over guideways, replacing the old steel wheel and track trains with the simple concepts of magnets. There is no rail friction to worry about, which means these trains can reach speeds of hundreds of miles an hour.
Other than high speed, because the trains rarely (if ever) touch the track, there's far less noise and vibration than typical, earth-shaking trains. Less noise and friction contribute to less mechanical breakdowns, which means maglev trains are less likely to face weather-related delays.
The major difference between a maglev train and a traditional train is that maglev trains do not have an engine — at least not the kind of engine used to drive standard rail cars along steel tracks. Maglev train engine is very unsightly. The magnetic field generated by the electrified coils in the guideway walls, and the track combine to propel the train instead of using fossil fuels.