I know the importance of gaming whilst defecating. But from what I've read the WiiU doesn't handle going through walls well.
Reviews have said that one wall (depending what it's built from) and even a floor is fine (as long as its not to far away). But multiple walls or an excess of steel or wires in the wall can cause frame rate drops and drop out from the WiiU.
Luckily, I can pretty much watch tv while I'm on the toilet. So it's safe to say, I'm going to have some pretty intense games on the gamepad.