So I haven't had enough stuff to actually put in there but I finally did on my shaman... and realized you are limited to those slots.
May bad on assuming that the space was unlimited (which now that I'm thinking about it... seems a little ridiculous) but at the same time I am still disappointed I was working on a collection of tier sets for the sake of having them... now that I know that it is limited I need to go and delete crap I know I'll never transmog or look at again.