Dark Energy: Present and Future

Understanding the cause of the accelerated expansion of the Universe remains one of the central quests in modern physics. Ongoing and upcoming observations promise to shed further light on this question. In this talk I will review the current theoretical and observational landscape and outline what we expect from the next generation of data sets. I will also touch on the challenges we must overcome to fully exploit these observations and to disentangle genuine signals of new physics from possible systematic errors.