Cool idea. If you could get one that was sort of christmas tree shaped, the cat wouldn't have a problem getting from one branch to the next. Or like another poster said, mount it to the wall and make some access holes or remove some sections of some branches so they could climb up. My cats have no problem climbing to the top of my regular 8 ft bookcase though.
We have one of those large papasan chairs and none of the cats has ever laid in it. We had a border collie mix who loved to sleep in it, however. We have 2 small ones that Simba and Gracie will sleep in from time to time. The funniest thing is that neither of them fit in the chairs so they kind of spill out of them.
A handyman could make a lot of money by making an easy to assemble to cat tree that is visually appealing. Unfortunately I am not that person :crazy