This is under the assumption that our energy usage keeps increasing geometrically. Which probably would make the Earth a heated ball of humanity.

Just for comparison: with a current energy consumption of about 1,80E+17Wh per year and the rotational energy of the earth being 2,14E+29J, it would take about 330 million years for the earth's rotation to stop.

So we still have a wide margin for out energy consumption to increase, even IF we only use only tidal energy.