The XMM-Newton Slew Survey - the Whole Sky View, the Rarest Events & the Deepest Ever 2-10 keV `All-Sky' Survey

XMM-Newton is the most sensitive X-ray observatory ever flown. This is impressively evident during slew exposures that yield on average only seven seconds of on-source exposure time. XMM-Newton slew data now cover well over half the whole sky, and large-scale movies and images of this new X-ray view of the cosmos are presented here. Many new sources and familiar features are visible, including the largest extended structures and the brightest sources in the sky. We present significant new developments and highlights; The soft-band slew sensitivity limit is close to that of the RASS, and a large-area RASS-Slew comparison now provides the best opportunity for discovering extremely rare high-variability objects in the soft X-ray band, and a number of examples of these, including black hole tidal disruption events, are presented here. Importantly, the 2-10 keV hard-band slew survey goes significantly deeper than all other previous large area surveys, and many new hard X-ray sources have been discovered. We investigate the source content of this survey, and show that the differential logN-logS of the extragalactic hard-band slew survey point sources matches very well to the shallow HEAO-1 A2 all-sky survey at bright fluxes, and to the 2XMM medium-deep catalogue at faint fluxes.