25 years ago when circuit feature size was 1 micron - we were saying the exact same thing. I really don't know how anyone is doing 14um. That seems totally impossible. But - whatever, they are doing it.
The problem arises when you reach the size of 1 atom.
The good news is we have a long way to go. 14nm is 140 angstrom. An atom is only about 1 angstrom in diameter. So, there remains tons of room for size reduction before we get to the atom. Looks like memory is going to be even cheaper.