I think this mobile office of the future will probably have some use, but perhaps not the use that the designers intend. As a moderate-to-frequent business traveler, I haven’t observed the lack of office space to be much of an issue. And where it is an issue, the lack of parking space is going to be an even bigger problem (which the article does acknowledge to an extent.)
Still, something like this might have an application for construction sites or managing emergency relief efforts. Also, the military might have some use for it. In other words, it might be a solution for those who are already charged with setting up temporary, mobile office locations.
But for the business world? I don’t know. It seems to me that hotel rooms solve the part of the problem that telecommuting doesn’t.