I saw that, it's not a concept anymore - it's been made. Looks pretty cool. But damn expensive.The keyboard concept I really liked was the one with the tiny LCD screens behind each key and you could configure it to show different things at different times. E.g. Games keys instead of the normal letters when playing games. And since it's LCD screens, they can be any colour you want them to be.
$462 is the price for ONE programmable key. And guess which one? The SPACEBAR. Talk about practical.