That article is what is technically known as a load of bollocks. There's no basis for the assumption of a 2% annual increase in energy usage. Just because it might be roughly correct for the last 50 years doesn't mean it will continue to increase like that.

The author of that article is assuming that in 1031 years when he says tidal power would have stopped the Earth's rotation, we'd be using well over 700 million times more energy than we did in 2013.

It doesn't sound very plausible.