I guess he just took the name from the 4x5", which could fit in a large jacket pocket with the rail removed (which would no doubt lead to jokes of the "is that a monorail in your pocket, or are you just happy to see me?" variety).
I can carry the 8x10" Pocket View with about five lenses and usually 3-5 filmholders and the usual accessories in a small knapsack designed for laptop computers. The tripod goes on a strap over my shoulder. I've also made a short wooden rail for mounting the camera on a pistol grip with a 120mm lens, not unlike the Sinar Handy or Silvestri or Cambo Wide cameras. It's light enough not to be thoroughly impractical, but I need to build a wide angle viewfinder to complete the project.