  We discuss the advantages which the next generation interferometer SKA (the
Square Kilometer Array) will bring for Very Long Baseline Interferometry (VLBI)
at centimeter wavelengths. With a sensitivity to micro-Jy level flux density, a
brightness temperature limit of about 10.000 K, and an expected dynamic range
in future VLBI maps of better than 1.000.000, the impact of SKA on the research
of compact extragalactic radio sources and their energetic jets will be very
strong. We discuss some consequences, including a possible combination of SKA
with future space VLBI missions.
