I don't think that chivalry's dead as much as common courtesy is waning.
While, I'd love for a guy to hold open the door for me or give up his seat on the train, I can't complain when women on the same train who are hale and hearty don't get up for the elderly/infirm or last week the woman who was so looked so far gone in her pregnancy, I thought she was going to go into labour.
I think there are some men who wonder whether the feminist is going to bite their head off for being a gentlemen. But I think for other men, the concept of courtesy no longer exists. But the lack of courtesy applies equally to men and women.
I think I'm pretty fortunate in that the guys I know are gentlemen - so no complaints from me.