Its similar to a trailer called the "Jumping Jack" Ive seen sold at some outdoor stores here in AZ, but this one has more plastic and stuff. But the "Jumping Jack" looks like it does just about everything that one does. Cant remember the price.... I was checking them out a year or two ago.
Actually, I saw something like this recently here in Houston. But the trailer looked to be about the size of a car hauler, and the tent part fit into one end, leaving room for an ATV and more behind it. The tent looked like a small tent trailer without the tires and wheels, bolted down to the main trailer.
There is this one also from Fleetwood (used to be Coleman before Coleman sued to stop Fleetwood from using their name any longer due to quality issues). I had a Fleetwood/Coleman, and it was nice, but after all the hassle getting repairs that were under warranty and going through 2 ABS roofs in 5 years, I would not buy another or recommend them to anyone.
I have a 2004 Fleetwood Taos tent trailer and have had no problems with it. My parents had a 1992 Coleman Pioneer Seneca for 10 years and never had any problems with it. This is a neat idea, but I'd be a little unsure with my quad underneath it like that.