Even with some self-winding watches, they require a funky gyroscope case on a nightstand to get and stay powered up.
It would be nice if the watch could go longer without a charge, however.
While some springs won't hold the energy longer than a few seconds, most watches will be fine with eight hours of not winding. A "funky gyroscope case" is useful for people that have more than one watch so that one can be wound constantly and ready to go at moment's notice--not to keep winding it over night. That way they don't need to set the time every time they change to a different watch.