Jeff: Well, if it's any consolation, I'm basically thinking of what I would do in such an event. It's an interesting psychological exercise.
Sure I'd miss friends and family, and maybe that's the way I would take the ending somehow, but I'm pretty sure I'd be OK for a while. The tricky part is in trying to objectively extrapolate what I would do, and how I would feel after the initial "party" is over, and the lights start going out.
The ending would have to be a self-revelation. I guess the over-arching premise can be boiled down to be careful what you wish for, though I would not explicitly state it.
The idea is appealing to me as a story because I have a feeling it's one of those things that everyone thinks about, but doesn't really talk about. The political response would be to admit that "man, I'd go crazy all by myself," and I'm sure there are a good deal of people for whom that would be accurate. But by saying "yeah, I'd probably be alright," you're risking the stigma of a "crazy person." What sane person would want that for themselves?
Maybe want is too strong a word, but suffice to say that, particularly in this day and age, there are those that would welcome relief from the day to day stress imposed by needing to find work, pay bills, "am I going to be able to afford to eat this week," etc., all things made easier by a lack of other people. No boss, no bill collectors, no one to answer to; who wouldn't want that?
I guess the problem with eliminating all people, is that you also eliminate society. As much as we hate paying the electric bill, without the people (who your bill helps pay) keeping that power plant going, pretty soon you won't have electricity at all. Now expand that analogy to include everything that society maintains, on which we as individuals rely everyday. There's your ending, somewhere.