Thilo, one of the advantages of these RFHs is that you can build your own camera around them, thus avoiding the cost of Linhof or Gilde cameras. When making your own cameras the roll film holder is the most difficult part to make. I know, I have built my own 6x24cm rollfilm camera.
And yes, I agree with you, for landscapes our natural way of seeing is very much panoramic. Panoramic pictures must be read in a different way, allowing for a more meditative vision which makes for a greater impact on the viewer.
Beware, the panoramic RF backs are quite addictive though, you can easily end using them more than LF cameras with film holders...