I feel quantum computing will become a critical field, starting a decade or so from now.

Since it's still in its infancy, higher level abstractions won't be engineered for atleast another 2-3 decades.

So the first few engineers who get into it - even software engineers - will have to grapple with fundamental quantum mechanical concepts, in the same way computer engineers in the 1940s-60s had to grapple with fundamental electrical engineering concepts.

Feynman's Volume 3 is an especially useful introduction to these fundamental concepts, and I feel a good investment for the future.