The article discusses the dynamics of cosmological vacuum in the de sitter Universe with emphasis on the so-called quantum cosmology. The evolution of the Universe, governed dark energy, compared with evolution obliged dynamic quantum vacuum. Current data indicate that our universe balances in a narrow region on the border between phantom energy, the cosmological constant and quintessence. Future observations will help to determine the nature of dark energy. This article describes the evolution of the future of the Universe with variable cosmological constant . When restricting the event horizon of the Universe, there exists a nonzero temperature of the Hawking. This effect leads to the decrease of the cosmological event horizon after a stage of expansion of the Universe with dark energy. Time compression in this universe is determined only cosmological constant. I see a new destiny of the Universe, which is significantly different from the endless cooling in the standard model.