This would be a non-issue if they did the player shops like they did in Everquest or even Maplestory where you have a zone dedicated to using player-run stores working in conjunction with an auction system.
An economy works more efficiently if all items on offer may be accessed and compared with ease. An centralized clearinghouse permits this. Player stores do not. When looking at that video, how many players do you see checking them? I counted up to one.
From what I've seen, this just looks stupid...not to be harsh, but it's 20 million (exaggeration) of the same little creatures, with the same exact colors, doing the same exact motions in a small area. I would much rather a cap on the amount of stores like this in a city/town/ext depending on its size...and certain amounts of stores in certain areas of bigger cities. Removing it completely is, in my opinion, a bad idea.
...just my opinion though.
That does look like crap, and I am glad they are doing away with that mess and clutter. You have such beautifully designed cities and landscapes and they are overrun with that filth and spam. Good riddens. I'd much rather have everything sold at an auction house, neatly categorized, and arranged by either level, or price or anything I want to sort by than spend 5 hours sorting through 500 personal shops in a city to find the best deal of an item when I could use that time to quest, level and have fun with friends.