1) Lots of people don't pay electricity
2) Whilst faster machines *might* be more difficult to make in the future, and that's a very big *might*, people can always make lots more chips with current technology
3) Mining equipment is going to come out that is a lot more energy efficient than current gen.
If you learn one thing from technology, is that it never stands still. There are always innovations when there is money to be made and people competing for that money.
1. Somebody
always pay electricity, it maybe included in your rent (ur still paying for it), or ur leeching off your parent/employer, but somebody always pays. There's no such thing as free electricity.
I don't think people care about the electricity bills of their boss or their university.
Yes, someone has to pay the bill, but as long as it is not the miner himself, he don't really care.