I do hope that BA will hang on to some of theirs, as LHR will remain with two runways for the forseeable future (in my view, in perpetuity).
After only five sectors in 380s SQ + BA (all in Premium Economy) on both decks, I can confirm that it is a delight to ride in. She is not a looker and has none of the majesty of the Queen of the Skies, but she is great. I shall look out for any route I plan that has the 380.
Sadly, Airbus took too long to make up their mind to build. Five years earlier or more, would have been great.