I think we are many to focus on the current shortcomings but it’s not unreasonable to think that a future chatGPT will be better at stating wrong things with a high confidence.

It is incredibly unreasonable to think this! GPT, by definition, is a language model. Unless the underlying architecture is fundamentally altered it will never be able to accurately assess the correctness of its answer.

If such an architecture is ever created it will almost certainly not be a "GPT"-like model.

Yes it would need some architectural changes obviously.