Well, this one anyway.
My dh isn't usually gadget-mad, but without our discussing it he recently bought an electric window-cleaning gizmo - and has gone round the house doing all the insides of the windows. (I will admit that they needed it.).
A few days later he's just remarked that it still surprises him how nice and clean they look.
I said, 'You've never said that when I've done them,' (with no gizmo). And he hasn't, but I'm not complaining!
What other housework-y gizmos would he enjoy 'playing' with, I wonder?