No one really knows. We might be just one breakthrough away. We already have Shor's algorithm, which can break those encryptions, though it currently works only on small numbers.

In quantum computing, it's not even a computing issue; it's a memory issue especially for RSA. 

Most importantly, we can't wait for it.

Adversaries can still store the encrypted data and just wait for the technology to decrypt it. So, we have to act as soon as possible.