You read it here first: Unicycles are going to be huge.
I base this prediction off the following coincidence: twice in the past week, I have encountered a unicyclist in the wild. First in San Francisco riding west on Brannan Street, then again this morning riding up Limekiln Canyon Trail in Sierra Azul Open Space Preserve. If you're keeping track at home, this means that unicycles are poised to break into both road bike AND the mountain bike sector. Exciting times ahead for riders!