There are a lot of proposals for making logical qubits. One of the more favorable is a two dimensional surface code [0]. Current experiments suggest that it is

There are a lot of proposals for making logical qubits. One of the more favorable is a two dimensional surface code [0]. Current experiments suggest that it is possible to scale superconducting processors to around 100 physical qubits [1] of relatively high quality. It should be possible to perform significant error correction experiments on them. As the article points out, noisy quantum computers won't be useless. They could be used to speed up some optimization and quantum chemistry tasks. [0]: https://en.wikipedia.org/wiki/Toric_code https://en.wikipedia.org/wiki/Toric_code [1]: https://www.nature.com/articles/s41534-016-0004-0 https://www.nature.com/articles/s41534-016-0004-0