I'm waiting for a third-party to make some sort of "SuperAmiibo" which would be able to swtich between and store the information for a bunch of Ammibos on the same device with the switch of a button. I don't think it would be that hard...
I don't know if I would want one, but it would allow me to keep the figurines safe while having all of them with me.
Just need the "super amiibo" to have a larger memory on the nfc chip to hold the data. But why not just an app for NFC enabled phones, or store the info in the "cloud" and access it that way hehe. Lots of ideas and possibilities, some of which may not be even considered because it would hold back profit.
I am curious to see when Nintendo introduces NFC cards, that seems very affordable in mass quantities for people. And... the Nintendo eshop should accept apple pay, google wallet, soft wallet etc... all the nfc enabled payment systems. That would make purchasing eshop stuff pretty snappy if you don't wish to keep cc info on file.