  The X-ray observatories XMM-Newton and Chandra provided a wealth of exciting
new results. Chandra delivered X-ray images of outstanding detail, reaching
subarcsecond spatial resolution for the first time in X-ray astronomy.
XMM-Newton provided the highest-signal X-ray spectra ever taken. The imaging
and spectral observations are greatly improving our understanding of the
physical processes in the central region of active galaxies. The increased
sensitivity also allows to peer into the high-redshift universe beyond z=5. I
shall provide a review of recent X-ray highlights on (radio-quiet) AGN from low
to high redshift, and exciting questions still open. I conclude with a glimpse
into the future of X-ray astronomy.
