SkyTran vehicles require about 4 kilowatts (3 horsepower) to travel at 100 MPH (link to figures on locked http://www.skytran.net when reopened). This is primarily an issue of aerodynamics: drag at a given speed is a product of frontal area times a coefficient for streamlining. A 2-passenger tandem vehicle has a much smaller cross-sectional area than a standard automobile -- this is the primary effect. Also, the support structure of a vehicle hanging from the guideway will be much thinner than automobile tires (more like bicycle tires). However, the cross-section and drag of the magnetic levitation platform inside the guideway is hard to work out until the design is done and real systems can be viewed.
An automobile with 30 HP is wimpy; performance vehicles and heavy SUVs require maybe another order of magnitude larger engines. They need to be big for two reasons:
Therefore, SkyTran will provide 100 MPH point-to-point transportation with *a tenth or less of the energy* required by today's automobiles. This should make the fuel reductions today's oil prices and global-warming concerns impose not only not painful, but actually easy to accomplish. What other technologies have similar potential?
Another point is that the energy is electrical in the track rather than on the vehicles. This further improves the economy picture, for several reasons.