Many scientists believe that this means eventually, energy - heat- will be completely spread out evenly throughout the universe. It will be the same temperature everywhere and at that point, nothing will be able to happen.
Because in something in order to happen, entropy needs to increase, energy needs to spread, the move needs to change. This may be the ultimate fate of the universe- thermodynamic equilibrium. The "heat death" of the universe.
It's been estimated that at the rate things happen, this end of the universe will occur in about 8 googol years, and you're contributing to it by simply existing. A funny consequence to all of this is the fact that people who aren't very active, people who don't do much except lay around, aren't just being lazy. In a way, they are being considerate.
Sloth may be of vice but to the universe, it's a fountain of youth. Choosing to do as little as possible means consciously limiting your contribution to the inevitable dispersal of energy and thus, in a teeny tiny way, postponing the "Heat Death" Of our universe. Relaxing adds time to the universe's life: in an amount of time, to be fair almost indistinguishable from zero, but still theoretically real. Being will make the universe last longer, so thanks for chilling out.