I think, if we're going to make desktop-sized touch screens, they should be tilted up towards us at about a 30-degree angle, like an architect's desk or drafting table. A flat desk is just not the way to work with a huge touch screen, nor is a wall panel comfortable to sit at for a whole day. But those tilted desks are just what we should have. Maybe we need flat shelves at the top or bottom to hold things so they don't roll off, but the main point here is that the touch screen itself needs to be tilted. Horizontal and vertical are not the only options, which seems to have escaped the creators of BendDesk, X-Desk and other big touch screens.
Mokalus of Borg
PS - Microsoft's DigiDesk concept is close.
PPS - The demo video is all about the software, though.