Pretty cool, but unless you can totally seal up the cab and possibly pressurize it, you going to get a vacuum which will pull the dust inside the drivers compartment. And the RZR has so many little cracks & crevices I dont know how possible it would be for Polaris to seal them up properly.
A few years ago, maybe Matt Parks will remember this, there was a UTV that raced Dakar that looked to be full bodied, and I remember seeing it part way through the rally where they had removed the windshield and I think side windows. I'm assuming they could keep the dust out and it was to hard to drive? This years Dakar all the RZR's have no windshields and have side window nets.