This is something that is either simply brilliant or utterly useless -- and I have no idea which is the case. I like the idea, but it needs research to see if it makes a difference. At least the developer should write some of his experiences with using this :)

I like the novelty of this. I think requiring keyboard input is distracting, though. Maybe you could just press spacebar when something appears on screen?

What's the theory/idea behind it? To me, the spacing between the numbers seemed to big to actually capture attention, but that may be the point?