A scientific case for XMM-Newton continuation

The presentations made at the workshop ``XMM-Newton: The Next Decade'', held at ESAC from 4th to the 6th of July 2007, contained an overwhelming amount of new results and well justified scientific questions that can be addressed by observations with XMM-Newton. XMM-Newton has over the next decade a solid scientific case. Given the high impact of X-ray observations, XMM-Newton operations are not only a matter for ``X-ray astrophysics'', but also of fundamental importance for astrophysics in general.