Let's say a husband and wife are alone on Friday night or on Shabbos day. Can the wife make kiddush for herself and her husband?
Since women are obligated in kiddush on a Torah level (Zachor>Shamor), they can make kiddush for their husbands. The Aruch haShulchan 271:5 rejects the idea that women should not cover men, limiting it to public venues (b'tzibur).
That said, I once went to someones house where the woman made hamotzi. It rubbed me the wrong way. Since the custom has been for the man to do kiddush, it seemed like they were making a statement that should be outside the Jewish purview.
I went to a family for Shabbos lunch who are much more modern than I am, and the wife made Hamotzi. I quickly went through the Halachos in my head (I knew the Mishna Berurah about woman making Kiddush for husbands, but not other people), and I decided that although it may be technically allowed, I was not happy to fulfill my obligation through her, and so I made a Beracha under my breath when the Challah came around. (Furthermore, the woman was wearing a head covering and was not covering her arms).
Afterwards, I asked my Rav, a prominent and renowned Dayan, and he told me similar. He said that although it may be technically allowed, nowadays women are doing this for feminist reason, to prove men and women are equal. This is antithetical to the Torah, which believes that men and women have different roles to play in this world, as Rav Kook explains in Oros Hakodesh (Volume 2, Page 439). The problem is not so much a halachik one as a hashkofic one. My Rav was very upset how people do this to make a statement and that Chazal did not view the world like that. The accepted practice is that the man always says Hamotzi and that is what we should do.
(Also, see the Kaf Hachaim [271, 8] who quotes the Marharshal, Bach and Kenneses Hagdolah who pasken that tradition has determined that women are never motzi men with berachos, not even their own husband. This is even stricter than the Mishna Berurah quoted in above answers.