Ready Player One
What was Halliday?
In Halliday's last scene in the movie, in the bedroom of the house where he grew up, he gives the egg to Parcival. Parcival is an avatar in the scene, implying he is in the Oasis.
Parcival is holding the egg and says to Halliday - you're not an avatar are you? Halladay replies "No".
Parcival ask him if Halliday is really dead? Halliday replies "Yes".
Parcival asks a third question, "What are you then"? Halliday does not answer the question. He smiles and says "Goodbye Parcival, Thanks, Thanks for playing my game".
What is implied by Halliday's response or lack thereof, to the final question?