Relativity and quantum mechanics are used more or less equally, and will be, for at least a hundred years. Relativity on large scales and QM on small scales.
they will eventually merge with unification. most likely with a variant of M-theory or Loop Quantum Gravity. At which time our descendants will be engineering not with atoms but with quarks and superstrings.
I think it is fair to say that quantum mechanics has way more practical applications. There aren't many practical tasks where relativity is needed. Sure, there are some, but it's a matter of degree.
Relativity and quantum mechanics are used more or less equally, and will be, for at least a hundred years. Relativity on large scales and QM on small scales.
they will eventually merge with unification. most likely with a variant of M-theory or Loop Quantum Gravity. At which time our descendants will be engineering not with atoms but with quarks and superstrings.
Quantum mechanics is apparently used in a long list of practical sciences.
Relativity apparently used in more exotic applications.
Dirac apparently already merged them. In 1928.
And even pioneered the concept of antimatter.
With Anderson apparently confirming that four years later with experimental discovery of positrons.