Why do we still have no (phone) screens that are still readable in sunlight?

Question

Some years ago there was this „paperlike kindle“ that was advertised with: „you can read it in bright daylight!“ and then we never heard about this invention again.

Edit: thanks for your input. I think I understand now.

In: Technology

Answer 1

I mean, I have a remarkable and I can read it in sunlight. You have never heard of this again, perhaps, but its on many ereaders by default nowadays.