It's a pretty cool idea, I can see how people looking to get heated flooring might like the idea. You need to pay special attention to how the tiles can be cut, and also I would pay attention to how you would attach power to the tiles at the edges of the room. I would probably make it so the wires in the tiles had to all be parallel to each other, and then you could have a long strip at two opposite edges of the room that would supply power to the large parallel grid of wires. Then, all you would need to do is size the power supply based on the size of the room and number of wires in it.
Much better idea than heated roads to replace snowplows