Further understanding Ohms Law
Most appliances have regulated power supplies, meaning that they adjust the resistance they present to the power cable to ensure that they always get the same power.

However for devices without regulation, the device really will get less power. For example, people often expect to be able to string large numbers of 5v LED strips together, only to find that the further diodes get dimmer and eventually stop lighting up all together. This is due to the resistance of the wiring limiting how much power the more distant lights get.