I feel that they'll be around for quite a while. Clearly, they're popular, and there's a place for the collector, BUT it would be nice if the content tied to some of them was easily accessible in-game, or through the eShop. Also, If they had "digital amiibo", or easily accessible amiibo card packs, more people can access that content without taking up lots of space in their homes. I don't like the idea of content being locked behind limited edition phyical figurines, and you can get the cards online in some cases, anyway.