That's not the main pitch, that's the standard dynamic cloud/container hosting claim, this is their pitch:
"Software is eating the world. Unfortunately, most businesses still can't deliver software successfully, much less do so at the pace needed to stay competitive. For those who wish to keep up, let alone lead, software delivery & operation must be radically simplified."
Just think of it as a function on demand. Call an API endpoint, a container spins up and does something, returns the result and shuts down, and you only pay for the milliseconds and RAM used in that amount of time.
"Software is eating the world. Unfortunately, most businesses still can't deliver software successfully, much less do so at the pace needed to stay competitive. For those who wish to keep up, let alone lead, software delivery & operation must be radically simplified."