I've got something close to the Talon control, without eye tracking, I'm working on now and then, using the Google API for voice interpret, because CMUSphinx was awful (50% accuracy per word, whereas Google was closer to 90%).
I'm hoping that Mozilla Voice when it comes will finally solve this or make it easy to build a decent control system.
Mozilla Common Voice [2] is the project to collect more training data so that DeepSpeech (and other projects) can achieve the accuracy that is known to be possible with the same architecture trained on larger private datasets.
Then there's Facebook's newly released wav2letter++ [3], which claims to achieve better accuracy with the same training data. However, some people have been unable to exactly reproduce those results, getting "only" 5.15% WER [4]. Still better than what Mozilla DeepSpeech can deliver, though.
[1] https://github.com/mozilla/DeepSpeech/releases/latest
[3] https://github.com/facebookresearch/wav2letter
[4] https://github.com/facebookresearch/wav2letter/issues/88