This artistic vision of a Hyperloop shows an air compressor up front (to move air resistance from the front of the capsule to the back), a passenger compartment in the middle, a battery compartment at the back and air-bearing "skis" below. Such bearings use a thin film of pressurized air to create low-friction interfaces between load-bearing surfaces.
Source: Wikipedia

The Hyperloop structure is envisioned here as steel "speed tubes" (transparent in the 3D rendering only for visualization), with solar panels to supply the power.
Source: Wikipedia

When Elon Musk, CEO and CTO of SpaceX, CEO and chief product architect of Tesla Motors, and chairman of SolarCity, learned that California was proceeding with construction of high speed rail to connect San Francisco with Los Angeles, his reaction (non verbatim) was, Why build a "bullet train" that would be one of the most expensive per mile and one of the slowest in the world? If we can send the Rover to trek across the Martian landscape, he opined, can't we come up with something more futuristic and inspired?

While California's bullet trainMusk reports technology for Hyperloop is being developed with the help of about 25 UCLA graduate architecture students at a facility in Playa Vista, Calif.

Hyperloop CEO Dirk Ahlborn is reported saying that within a decade, and with, oh, about $16 billion, this visionary technology could become a reality. He said Hyperloop would allow a trip L.A. to San Francisco in 35 minutes, and cost passengers only $3.