Wireless transmission of electricity.

While it is true that we can install solar panels in space where you get the advantage of having daytime all the time, transmission of the energy back to earth is extremely difficult. Take note it is energy as what electricity transmits. Beaming it back to earth stations through microwave would cook up flying birds. The microwave levels trasmitted by your remote controls are way too small. If you wanna use energy wirelessly throughout your house through microwave, then I guess you're just making your home into one big oven. Technology right now doesn't offer yet a more practical and more efficient way of trasmitting energy. Even fiber optics can't handle it. So maybe in the future some other solution might surface.

Yes, it probably is already happening in your home. If you have a TV aerial you are already converting radio waves into an electric current. There are two big problems with this. Firstly, do you own a microwave oven? Well, for the amounts of energy we would need to transmit you would be heating up everything in range, that includes you, your pets, your house etc. The second big problem is that of efficiency, the energy radiates outwards and most of it would be wasted and never reach the reciever.