The gem store has all the other items including outfits, gliders, backpacks, weapons and even chairs which not many people seem to have or want. The only thing missing at this point are cosmetic auras which China got way back when. Now I know there are people who dislike auras but I'm sure many more like them, as the most played meta events included SW, AB, TD even the Pinata and Death Shatterer is popular. With that said, adding auras in the gem store would also help Anet make quiet a bit of profit which should appease ncsoft.