There would often be a sense when you hear this that it should have happened earlier. This is long overdue. This should have happened ages/years/months ago.

This has been a long time coming. Variations of similar meaning This has been worked on a long time This has had a long gestastion period This has been in the works for a long time This has taken a long time to arrive/reach this point/reach fruition We have waited a long time for this. Eventually, this has arrived.

It was bound to happen.