I think the design is a good concept. Just because it departs from the "norm" doesn't mean it's not good. If people will be more comfortable riding a bike like this, then it will be good for cycling.
Who are we to say what a serious cyclist is? There are recumbent riders on Lowracer recumbents that ride as much as any other cyclist, and sit on trainers indoors in bad weather to keep in shape. I've seen them post their results for century rides that were under 4 hours.