[PyroLagus]

Value isn't always apparent immediately. Quantum theory seemed largely useless, but now it's useful in computing.

[klyrs]

> ... but now it's useful in computing.

I do hope you're not referring to the google leak. That result is merely unreproducible with classical computers. It isn't currently useful for anything except PR.

[imtringued]

Unless you mean something very specific by "Quantum theory" I don't understand how you can even make that statement about such a broad topic. Quantum mechanics are extremely useful.