shoe cleaning floormat

I thought this was a neat idea a company in Japan has come up with a floormat that will vacuum the dirt and debris from your shoes. It's a neat idea but I'd be curious how practical it would be for everyday people? I know I hate all the junk that gets trampled thru the house in the summer in particular grass. Perhaps this idea would be of better use in an industrial or commercial setting? Would you use such a gadget if it was available?