In a future where winners are conceived using genetic engineering, a born loser buys the identity of a winner on the black market so he can fulfill his lifelong dream of space travel.

It's a logline for a script that was made into a movie.

Probably worth writing. Seems rather a low aspiration though - if you're a winner now you would want a better mate, riches, power, and space travel. Otherwise, just make a boat load of money and you can go nowadays.

So, if he doesn't make it into space, nothing much changes right?

Mmm... I seem to remember that the film wasn't particularly good - it wasn't bad, just a bit forgettable. Maybe it's the low stakes.