I’m guessing there’s a big crux here for both windows and phones. Article says ten times tougher than glass and several times stronger…but wood is not HARD. Hardness is what resists scratching. Something that scratches easily will knock it out of a lot of useful scenarios. I’d imagine most things you’d want to be clear you wouldn’t need the extra strength for, or would want it to not show scratches.
It won’t ever be your cell phone screen. Optically, it’s less clear than what we have, and while the wood/epoxy is “tough”, wood is not “hard”. It will scratch easily.