If this device really exists, it will soon be illegal. The excuse will be national security.

This needs to be built in to all new computers as from yesterday.
One wonders if this device can be built in to the communication linkage between the keyboard and the computer core(s) if that could defeat any key logger malware that has got past the computer system's firewall and antivirus set up. As it is, every time I go on line to check my bank account I am concerned that someone somewhere will be noting down my security information and the next time I log on I will find that I have had my account emptied, despite all the precautions I have taken.

Eddie is an optimist. It won't be made illegal; that just invites people to use black market devices. Instead, NSA will infiltrate manufactures and compromise the devices at the root.
Nonetheless, we'll find a way to get clean devices. We'll have to work at it.

This is not quantum cryptography but a true random number generator.
A quantum cryptography device can detect when a secured line is tempered with, this is not what this technology is about.
There are many ways to generate truly random numbers that don't rely on a pseudo-random algorithms with a seed number. While this is a nice new approach, the article completely misrepresents this technology by conflating it with quantum cryptography.
A message encrypted with a true random number is still vulnerable to brute force attacks (although this is a minute risk if the key is sufficiently long).

All very well until the key is lost - or if someone wants your data, stolen.
All the clever cryptography in the world will not overcome good old-fashioned larceny.

AsI understand it, it is possible to intercept and decode a message, but it impossible to do this without being detected. Any decode attempt spoils the key.
Of course, any trial and error attempt will also spoil the key, so decoding is not exactly trivial. You only get one shot.
The intended user has the same restriction - one shot at decoding. Better not make a mistake!

I will be glad when a smart computer takes control totally away from the stupidity of humans.

Can we install in PCs, smartphones etc Mass produce

I doubt that they'll make the device illegal; they'll just require a backdoor be installed in it. That allows us the illusion of safety while preserving the ability to spy on us. MUCH better than making it illegal, because of that illusion of safety. (Yes, I'm getting cynical in my old age.)

First, "random" is an epistemological word meaning "of unknown origin". It is often used as if it were metaphysical, meaning "of unknowable origin". Every unknown can be known, nothing is unknowable. It follows every code can be broken, and this encoding method will be cracked, someday.
That said, when this becomes available, I would use it to keep my bitcoin safe. That is a problem now. I have been waiting for a secure system that is not complex before I used bitcoin.