I have no interest at all in Amiibos, and will not buy a single one of them.
I can see how they have been extremely successful for Nintendo, and thus I think Nintendo will almost certainly lock more content behind them on the NX, to tempt more and more of the fence-sitters into getting them.
For me, though, the upshot is that I won't be buying an NX at launch, which is a pity, because I did so with all Nintendo's earlier consoles. I'll wait and see how it pans out. If you can play the games I like (2D and 3D Mario, Mario Kart, Kirby, Yoshi, Donkey Kong) without needing Amiibos, for any content that I'm interested in, then I'll get one. If there are extra levels / tracks / dungeons or whatever that you need plastic figures for, then I'll just reluctantly have to admit that Nintendo's console isn't what I want any more, and restrict my custom to Sony and possible Microsoft.