There's much more concern with asymmetric algorithms like RSA or elliptic curve crypto. I don't know the details on symmetric ciphers like AES, but nobody really seems to be worried about them.
However, it's also not necessarily true that all asymmetric cryptosystems would be broken by quantum computing. For example, the McEliece cryptosystem is gaining attention lately because it's not known to be vulnerable to any quantum attacks. If you're interested in finding out more, google for post-quantum cryptography; there's lots of interesting info out there.