When you buy a device, you expect to own it. You expect to be able to open it up, mess with it, and improve it. At the very least, you expect it to continue to work for its intended purpose.
What you don't expect is that the manufacturer will remotely cause the device to stop functioning unless you agree to be bound by new legal terms governing your relationship with them.
Yet this is how Nintendo's update to its end-user license agreement (EULA) for the Wii U works.