In all seriousness, slightly warmer weather would generally have beneficial effects for humanity, as would an increase in atmospheric levels of carbon dioxide, which is basically airborne plant fertilizer. More important would be the enormous benefits to humanity from the greater wealth and technological progress made possible by not shutting down all our power plants and not crawling into an ecologically friendly cave.
http://thefederalist.com/2014/07/01/global-warming-the-movie-starring-freezing/