The companies and individuals who approach bitcoin technology with a 20th century mindset will find no success. They will seek to harness the innovation of Satoshi's invention, and in doing, will slowly realize that the killer application of this technology is to render them obsolete. Bitcoin is an evolution in our concept of the corporation, and a blueprint for decentralized, trustless, openly accessible commerce in the 21st century.
Paying per computational step could mitigate distributed denial of service attacks (DDoS) and abusive spam when launched against a large number of targets at a near zero margin cost. The potential benefits of this pay-per-computation model for the mitigation of network abuse cannot be understated.