I saw at the Tampa RV supershow there is a new class of rv called an RUV,,,to me they are just mini motor homes which Winnebago made for many years called mini-winnie . so they are not really a new...
As a point of interest, even putting a Class A motorhome on a Ford van chassis is not a new idea. Roughly 20 years ago, Fleetwood sold a model, the Flair, which was a Class A motorhome on a Ford E350 chassis. (the Flair has since grown, and later models have all been built on the Ford F53 chassis).