Food for thought or a mind fuck as it were?

I had an interesting thought this weekend while discussing Jehovah's Witnesses with my friend and her boyfriend. According to the book of Revelations, 144,000 Christians will be the only ones to make it up to heaven. Only 144,000. My thought was, is it a first come, first served thing until the last slot is filled or does everyone have to wait in an afterlife limbo until the world ends, *everyone* dies, and the lucky souls are hand picked? If it's the former, Christians today are getting fucked up the ass. People who died in the very beginning had a much better chance of getting in than someone now. For all we know, there are 144,000 souls up there already congratulating each other on getting in. Tense thought...kind of like getting into Harvard.

I don't feel like wikipedia-ing to find out the stance on that one. I'll leave you to mull this one over.