Polarimetry is a branch of X-Ray Astronomy almost complely neglect for more than 40 years.
Recently both NASA and ESA have approved advanced studies on three missions aimed to this subtopics, so that the probability that a mission of Polarimetry will fly within the next 10 years is relatively high.

The most performant of the proposed mission is the X-ray Imaging Polarimetry Explorer (XIPE) one of the 3 missions candidate for ESA M4 slot. I present the design of XIPE, its observing capabilities and what we expect to understand about the physics and geometry of X-ray sources, that cannot be explained only by spectroscopy and imaging. I present some predictions on observations of Pulsars, Pulsar Wind Nebulae, SN Remnants, Blazars and other topics of Astrophysics and Fundamental Physics.