Concepts strive to sway opinion by eliciting emotions. Fundamental to this purpose is the new, the aspect that is beyond question different than what has been done in the past. The new is what causes the audience to pause and react.
This reaction can be polarizing (yes/no, this/that) in order to make progress toward a detailed design. This reaction can be stimulating, sparking new ideas to increase the number of possibilities. Effective concepts are carefully constructed to appeal to particular emotions.
Boredom is the enemy of design concepts.