There will always be the next big thing.

Maybe VR glasses will be big soon. Do we trigger on 'blink'? 'look harder'? 'eyeball wiggle'?

Maybe voice interfaces? Trigger on 'say it louder'? 'stuttering'? 'hesitant'?

Maybe guestures, facial expressions, thought patterns? 'think hard about that button to trigger tooltip'? 'furl your eyebrows'?

As I've said, decades have passed with no progress. If progress in other fields is a reason for waiting, it'll be stagnant forever and eventually just dead.