Amanda Marcotte at Pandagon links to an article about artificial sperm and discusses the comments at Salon of some men who reckon that this presages the end of men: http://pandagon.net/index.php/site/comments/were_not_all_out_to_get_you/
The reasoning goes that women don't really like men and sex and would, if they could, dispense with men altogether if they didn't need sperm. I suppose that artifical sperm or parthenogenesis would provide women with more options, but I don't see that these technologies would lead to the wholesale abandonment of men. I like to think of myself as more than a life support system for a penis. And I know that Mrs Vache Folle doesn't love me for my sperm. Hell, on the rare occasions when I deliver sperm, she can't wait to get rid of it.
Men have lots of other uses besides sperm production, storage and delivery. We do yardwork, for example. And some women genuinely like us. They would keep us around even if they didn't need our sperm, perhaps as pets.