If that pixel then also reflects light like most materials, then yes indeed, it would be the holy grail. But for the next couple of hundred years or so I think

If that pixel then also reflects light like most materials, then yes indeed, it would be the holy grail. But for the next couple of hundred years or so I think we'll be more than happy with 32k~64k displays or something in that range. Displays with pixels the size of molecules would effectively be a kind of real-time matter duplicator. Bound to happen one day, but not today ;)