Sources and relevant Wikipedia articles are in 2023 in science.
This is the latest summary and last one for 2023. I’m making these summaries so you can stay up to date even if you only have little time while updating Wikipedia articles. Monthly mail notification here. A few more items are in the Wiki article. Non-included items and criteria can be found here.
That EEG helmet development is huge, even if it’s only 40% accurate. The fact that it can be done at all just made it cross the threshold from sci-fi into just sci.
Higher accuracy was achieved in an earlier study where another team used large fMRI machines (it was featured in the version for May). There participants listened to audiobooks / speech while being in the large machine; I guess long training would be easier here but it’s more limited since it’s EEG. However, they claim they have exceeded 60% by now.