It's... what is it. It's a story about some friends having lunch on a generation starship. It's not the first chapter of a novel I couldn't write, oh no, perish the thought. Totally a short story.
Ever since I went to Florence, everything I have written has Florence in it, whether it happens to be set in this world (My Real Children) or in Heaven (St Zenobius and the Aliens) or in Plato's Republic (The Just City and The Philosopher Kings) or, in the case of "Turnover" on a generation starship.