But that is basically useless for almost everyone.
It is available to anyone that can get their hands on pile of blank cards and the respective SDK.
With 5 minutes Google search effort:
https://www.alibaba.com/showroom/java-chip-card.html
https://www.oracle.com/technetwork/java/embedded/javacard/do...
Yes, but that is the definition of a nice.
Also I suspect that Java cards use a stripped down version of Java.
So no, it isn't closer to lua than Java.