Cool looking, but all I can think of is how hot it would be in that terrarium, er, I mean the clear plastic bubble.
It did remind me of a hybrid we looked at a few years ago when shopping for our TT. It went further down than a typical hybrid tented bunk and then allowed for a full height inflatable bed that you could walk around.
You never see tented pop-outs on driveables, at least not in this country. It would be interesting...but I know hybrids tend to have the reputation of leaking...then again, class C cabovers have that reputation too ;)