The credit cards with an embedded chip are starting to appear in the US. We have them for travel in Europe where they are necessary for kiosks tickets etc.  We bought the more flat card sleeve for my husband and this one for me because I have more "stuff'.

I am not a technology person, but I feel better knowing I have at least tried to protect the cards with the chip using this. I'm sure there are ways around it if someone really wants my info, but maybe this will steer them to an easier mark.