Doubtful that it will catch on because there is some level of impracticality. I've seen a few 36" unicycles running up and down the road. One day I was passed by one at a light. We ran together for maybe 3/4 of a mile. It was all I wanted to do to keep up with him.
Jeff Wills provided this link
http://mtobikes.com/black-sheep-bike...n-bike-review/. I saw this also doing a search after my encounter with the unicyclist. Looked interesting- but not practical.
Walmart and 32"? I saw those there and thought at first the tire size may have some merit in some conditions. It might if the supply for lightweight tires, and rims became available. I wouldn't have any concern about Walmart 32s becoming another standard for rim and tire sizing. Gotta give someone credit though for trying a different marketing approach.
BTW- Anyone went out and hefted one of those buggers? No way you'd want to ride it!