  A new mission about twenty years after Gaia with similar astrometric
performance would be important for all branches of astronomy. The two missions
together would, e.g., give much more accurate motions of the common objects due
to the large epoch difference. By adding a Near-InfraRed (NIR) capability to
the new mission we will be able to peer into the obscured regions of the Galaxy
and measure up to 10 or 12 billion new objects and reveal many new sciences in
the process. ESA has now ranked the development of this mission so high that a
launch about 2045 is quite probable. A brief history of the project is
included.
